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

2????????

3???sn??

4???????

5?????

????????????9????20?? (??? ????)???,?A?20??????????(??)?????????????????,????,??????,?????????????,??????

?,??????2.58%,????????A???????????????????????,???????20%????????,????????????????9%?

???,??,??,???????,?????????,????????????,?????????????????;???,??(20???)??,??,??????

??,????????2.39%??????,??????????????????????????????,?3%?

?????????,??????????19???????????????,????12???????0.62%,??????????2614.6?,?????????????

?,A????,??,???????,??????????

?,??,????????????????2736??????????,?0.03%;?????????8075??????????,??0.15%;?????1536??,?0.64%?(?????) ????????:???????