      

  

                                
      30                                                             
                                                   
                         
                                                                        50    
                                          
                                                                            
                                     
                                                                                    
                                                                                    
                                                                                                                                                                                〔1〕                       
                                                                                                 
            21                               
                                                                                                                                                                                                                                                                                             
                                                                                                                                  ,                                                                                                                                       〔2〕                                                                                       
                                               〔3〕                                                                                                                        〔4〕                                                                                                               4                                                                  
                                                                                                                                               
                                                                
                                                   〔5〕   1904   50               
                                      
     
    
    
    
    
    
    
     〔6〕
                              
                                                                                                                                                                                                                                                                                         13               
                                                                                                     

                                                             
   0-3 
   3-12 
   12-18 
  18-25 
   25-35 
   35-45 
   45-60 
   60-80 
   80   
                                                 〔7〕   13                       13                                                                                        
                                                                     


〔1〕〔4〕                          
〔2〕                      2013  
〔3〕                      2011  
〔5〕                            2013   3  
〔6〕                    2002  
〔7〕                    2001  