??? 6? ???? ????? ????????(KRC)? ??? ??? ?? 1000?? ???? ?? ????? ??? ?? ?? ?? ??? ????? ‘???? ?? ? ??’? 29%? ?? ???. ?? ‘?? ????? ??? ??’(23.3%), ‘?? ??. ?? ??? ??’(18.0%), ‘???? ??’(13.6%), ‘???? ??? ??? ?? ???? ??’(10.9%)? ????. ??? ???? ????? ??? ‘???? ??’? ??? 64.4%??? ??? ????? ‘???? ??’? ??? ??? ?? 77.1%??. ?? ????? ????? 95% ?????? ±3.1%????.

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