7                         1961                  7    10                  1~7.2                4            24.6        2.8     1961                  7.8         18.4      54      10     7                          
     7   15         

30.9           4          7.7                           

                                                      16  8  ~ 17  8      41%                      
            7   18~21                                                   0.1 ~ 9.9                       10 ~ 24.9                  