???? ????? ??????? ?????? ?? 20～40? ?? 1000??? ‘??? ???? ????? ???? ?? ?? ???’? ????? ?? ??? ?? 40.7%? ?????? ???.

?????? 20?(39.8%) 30?(41.0%) 40?(41.3%) ? ?? ???? ??? ???. ??? 30?(44.3%)?, ??? 40?(46.4%)? ?? ?? ????. ?????? ?? ‘??? ??(26.8%)’ ‘???(16.1%)’ ‘??(10.3%)’ ‘????(6.1%)’ ??? ????. ???? ??? 24.4%? ??? ?? ??? 7.8%? ???. ?? 40? ??? 36.7%? ?? ?? ?????(36.1%)? ??? ??? ???.

??? ?? ray@donga.com