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