??????? 7??? ?? ??? ???? ?? ?? ???? ???? ? ??? ??????(ELS) 2578?? ????. ‘???? ELS 2578?’? ???, LG??? ?????? ?? ?? ???? ? ???? ??? ??????? 50% ??? ?? ? 1.18%(? 14.16%)? ??? ????. ??? 3??? 6?? ??? ???? ??? ?????? 95%(6??, 12??), 90%(18??, 24??), 85%(30??, ??) ???? ????? ????. ???? ??? ???? ??? ???? ? ??????? 50% ???? ??? ??? ??? ??? ???? ? ??.