?????????????????1.2???

????:??????????:?????50?????

????????????????????7???31??????????? (???)??7????????????????31?????????,??1.2??(?,??),???????????????????17.7%?

???,????????,??????????????,????????????????????????????????26.8%?20.8%?10.7%?

?????,??????????????????????????,??4300????????????????????????????????,??76.2%,??????????????????30.4?????????????

???,??????????????????,?????13.9%????,?????????????????????????????????,???????????????????????????????????????????????,?,?????(?) ?????????????????????:???