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

2???????

3????????

4??????

5???????

?????????????????????7????????????15??????? (???? ?????????????????????)6???????15???????????????????,6????????,70??????,???????????????

??,?????????????,6??,?????????????????0.5%,???????0.2??????????0.7%,??????????0.6%,??????????????????0.2?????

????,????????????????????,??????????????????0.4%,????????????0.8????????????????,???????,???0.2%??0.5%????0.9%,??????????????????0.1??????0.9%,???????????????????

?6???????,???????,?????????????????????????????????????,???????????

??,6??,70??????????????????,?????4???????,???????????????

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