????:1????????:????sn

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

3??????????

4???????

5???????????ktv

???????12??22????? (?? ?????????????)22?????????????????,??????????,???80???????????????,??????1997??????????

?,?????19?????90?,1?11??73.9??,????35%,?????2019??59%?

?,????????????????????,??12??20?????????,?45.6?,???????57.2%,??22%?

???????????????12??17???????????????????,??9300?,??30%???????,?250????????????11?,????????????????????????8.3?????,?196%?

?????,?????????????????7??????????,????????????????????????????????(???) ??????:????