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

2????????

3???????

4??????????

5?????vx

???????????6???????27???????????????????? (? ?????????)???????????27??,15????,??3.4%,?????,????

??????,15?????????????,????????14??0.9?????????????????????????????????????,????,15??14??0.8???????????,????????????????,?????

????????????,????????????,?,?????????????????15?????????????????,????2.9%,??????,5??????????3.8%,?????????????4?????????????????,??????????????????

???????????,15???????,??41????????,??????????????32?,?78.0%,?????????14??2.4????

?????????????????????????,????15?,??11.5%,??????????8.1??????,?3.6????????????

????????,?????????????????????,15???????,?????10.9%,???????????????,13?????(???) ?????????????????:?????????