????? ??? ?? 25%? ????? ?? 1?50?(7.2%)? ??? ??? ?????? ??? 20? ???.
??? ??? ?? 9?? ??, ????? ??? ?? 34.6% ??? ????.
??? ? ?? ??? ???? 25% ???? ????? ?? 3??? ??? ???? ????, 4??? ??? ???? ????? ????? ??.
??? ??? 8??? 6??? ??? ?? ?? 2? ???? ??? 2?? ????? ???? ??.
〈?????〉pisong@donga.com