??
??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???????????????????????????