????????????20??????

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

??????????????????????8?????31????????????????? (????????????? ??)??????8?????????????31??,8???????50.3%,?????20??????50%??,??????

???,???,?????????????????0.6???????????????????0.1????????????;????????????????????????,?????????????????0.3???????????????????2???

???????????????,8?????,???????????????50.3%,????????20???????50%????????,?????????????????50%???????,???????????

?????????????????,???8?????,??????????????50.2%,??0.2?????,?????????????????,??????,???

????,?????????????,?????55%??????????????????????;????????,???????????????,??60%????????????????????

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