?? ????31.9??? ???????????????14.5%
????:1????????:??????????
2??????????
3???????100?????
4?????????
5????????200????
??:??11????22?????????????,????10???????????,???31.9???,????14.5%??,??7.9???,????????????????48.0%;??4.9???,????20.3%?110??????????,?????7181???????,??8.3%;?????4502????????,??20.7%?
?????:???