???? ????? ??????? ?????? ?? 20～40? ?? 1000??? ‘???? ??? ????? ??? ? ?? ?’? ????? ?? ??? ?? 38.1%? ‘?? ??’? ???.

?? ??? 20?(49.1%) 30?(35.0%) 40?(30.1%)? ??? ???? ?? ???. ? ??? ?? ‘???? ? ??’(33.7%)? 20?(24.2%) 30?(34.4%) 40?(42.5%)? ??? ???? ?? ?? ??? ???.

????? ‘???’(12.4%) ‘??? ?? ???’(8.5%) ‘??? ??’(3.9%) ‘??’(3.4%) ????. ??? ?? ???? ??(11.2%)? ??(5.8%)?? ?? ????, ??? ??(2.2%)?? ??(4.6%)? ?? ???.

(▲?? ??? ??? ???? ?? ???? ???? ?????. ????? ???? ? ????? ??? ? ????.)

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