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

2????????

3??????????

4??????????

5??????????

?????????10?????30?????????????? (?????????????????????? ?????????????????????)???,????????30????,?????,???????????????????

?????????????????????,????????????,??17.0%?18.8%?35.3%,????????20.7%,???35.3%?

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?????????????????????,?????????????????????,??,???????????????????????“?????????????????????????”?????????????????????????????,??????,?????????????(??????) ?????????:??????????????????