????:1??????????????:?????????

2????????????

3???????

4?????????????

5????100?100??4??

??????????????????????,??????????????????????????????????????????1??????????????????,????,??????

???????????,????????????1????????10%,????12.1%;?????????1???????????????????????????11.89%,??19.71%;????????1??12.47%,??????????17.67%?????????????1???

?????? ?:??,

??????????,?????????,?????????????????????,?????

????,???????????????????????,?????????????

??????,???????????????1??,??????????????,??,???????????????????1????????????????,????????????? ????????:????????????