????“??”???1.56???????????

????:?????:??????200??500

???????????9????????????20??????????????? (? ????????????)?????20?????,??????????,??????????????????“????”,????????????????“??????”????1.56??,?7.6%,??????

20?“???”???,????,?????,????????,???????“???????”,??,?????,??????3.6???????????????????(?????????)?????????????????,????????5.4??????????????,????????????

??11????“??????????”????,??????????????,?????????????20%,??????????????,??????????“??????”?????????????????,?????????

??????????????????,?,?????????,???????????,?????,????8????????????????,??2.6????????????????????,??????????????“??”?????????????,????????????,???(??) ?????:???????????