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

2?????????

3???????????

4???????

5????50???????

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

????????????????,?????,??????42.3???,????????15.3%,??????????????????????50%,?????111??,??????,?????????????????,??????????7.3????

???????? ????:???????????11?????????????????????,?????6400??,?35%,????????????,????????????????1/3,???????????????

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

(??????????????????)

??????:??????????????