???????????:??10?????,??31.9???

????:?????????:????????vx

???11???????22?? ??,11????????22??,??????????1~10????

????????????10????????????????,??31.9????????????,??14.5%?????,??7.9???,????????????48.0%;??4.9???????,??20.3%?

1~10?,?2880??,???????128????;??7181????,??8.3%;???????????4502?,???20.7%?

?????:?????