??
???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%?(???????????) ???????:?????????????
?????????
?????A???????????????????????????