????:1????????????:???????????

2????????????

3???????????

4???????

5???????????

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

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

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

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