      
         3.8               
            

 

                                                                                                          
                                                                                                                                            3.8                                   
                 1940                                                                                                                           

        

           17                                                                                                                                                                                                                       
                                                           1960                                                                                                                                                                                                                                                                                         
                                                                                          
                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                            

         

                                                                                                                                                                                                                                                                                                                                
                                                                                                                                                                                                 
                                                                                                                                                                                                                                                                  
                                                                                                                                                                                                                                                                                           
                                       1979   1983         3.8     1985           3.8                                                         1984                                                   
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