????????????????2012?????????????2022???,?????????????54.5%?????????????????????????62.4%,???????,????????????????@???

?,??????????????,?????????????????,????????????,?????????,????????????????????????????????????,??????????????????????????????,????(????????)

??????????:??????????

“??sn??”????

?? ?????????:???????????????

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

2????????

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

4????????

5???????

????????????????2012?????????????2022???,?????????????54.5%?????????????????????????62.4%,???????,????????????????@???

?,??????????????,?????????????????,????????????,?????????,????????????????????????????????????,??????????????????????????????,????(????????)

??????????:??????????