??1????????21???????????????? (? ??????)????A????????21????????????????(??)???????,??????,??????

???????,??????????????????3.89%?????3.26%,?????A?????????????????????,?20%?,?????????????????????9%?

???????????,????“1+N”?????????????????????????????????“1+N”?,??????????100???,???

??????,???????:???,????????????;???????????????????????,??;?????????????????,??????????

?????,?????????????,???????????2.16%??????????????;????????,????????????10%?

??????,?,??3242????,???0.05%;???????????10305?????????????????,????????0.48%;???2112????????????,???0.36%?(?) ???????:??

??

??:???????????,??????????,??????????????