???????????? ?????7???

????:??????:??????600??????

?8???16??? (??)??????,???????????????,?,??????????????????????????????????2019????11.9%?9%?18.7%,?????7?,??????????????????

??????????????,?????,?????????????????4335???????,?????262?????????????????????16??,??????????,???10??

??????????????????????????????????????,????????????????,??????0.0016??0.01,?????????1/3????1/10?

?,????????19?????????,??20%? ?????:??????????