??? ??? ??? ???? ??? ??? ????? ???. ????? 1??? ‘63 ??? ????’? ???? ??? ???? ????? ?????? ?? ? 10.5~14.5%? ?????.
???? ???? ?? ? 14.5%? ????? ?? ??? 85%??(?? 4.5??? ? 3.825 ??)?? ????? 1%??? ?????. ? ???? ???? ?? ???? ? 20?? ???? 2%???, ? 5?? ???? 0.5%???? ?????. ??? ????? ??? ???? 1%??? ??? ??? ?? 10.5%? ????? ???? ? ?? ?. ?? ???? 1.0%? ?????? ?? ????.
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