22??? ???? ??? ???? 0.3%??? ?? ????? ?? ? 1.5~2.5%? ??? ????.
?????? ???? ??? ??? ??? ????????? ??? ????? ??? ???? 0.3%??? ???? ??? 21? ???. ???? ????? ?? 1?? ?? 1? ??? ?? ? 1.8%?? ? 1.5%?, 1? ?? 2? ???? ? 2.3%?? ? 2.0%?, 2? ???? ? 2.8%?? ? 2.5%? ??? ????.
??? ?? achim@donga.com