LF? ??? ????? ???? 4?? ???? ??? ????.
20? ????(IB) ??? ??? LF? 2?? 400? ? ??? 1600? ?, 3?? 600? ? ??? 2400? ?? ?? ? 1000? ? ??? 4000? ?? ????? ???. LF? ?? ????????????(????) ?? ±30bp(???????, 1bp=0.01%???)? ????? ??? 2??? ????(―) 3bp, 3??? ―2bp? ????? ???. LF? ?? 28? ???? ??? ????.
1974? LG??? ?????? ??? ??? LF? 2006? 11? ???? ? ???? ????? ?? 2007? 12? LG???? ??????. ?? 3? ? ?? ??? ??(19.1%) ? ?????? ?? ??? ??? 49.0%? ???? ??.
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