A??????????????

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