????: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%? ??????????:??