?????????2100??????????60%

?????1?15??(?? ???)??????????????????2007??????????5.65?????,???????30??????1/10???2100?????????????????60%?
??????????????????1975????????????6.254?????2000?? ???????5.73??????2007???????????5,?????????.65??????30?????????0.6???????9.6%???????????100?,?????????????????????2100????????????????60%?
?????2007???????????13.64??????30?????0.38???????2 .8%???????????????????????????????????33.61%?19.95 %?????????????20.22%?
??????????????????????????????????????????????1975 ??2000??2007??????????????????1:25???????????????? ??????????????????????????????????????????????,????????????????????????????(??