“??, ?? ???? ? ?? ???.”
???? ????? ?????? ?? 20～40? ?? 1000??? ‘??? ?? ?? ??? ???’? ????? ?? ??? ?? 43.6%? ‘??’? ???.
“??? ???”? ??? ??? 20? 47.3%, 30? 44.9%, 40? 38.6%? ??? ???? ???. ??(37%)?? ??(50.2%)? ?? ?????, 30? ??(53.3%)? ?? ???.
‘?? ?? ? ???’(32.8%)? ? ??. ???? 44.4%? ?? ?? ????. ???? 20? 26.9%, 30? 19.2%, 40? 17.5%? ??? ???? ?? ?? ??, ?? 30?(51.5%)? 40?(50.5%)? ???? ??? ???.
‘??’(11.9%) ‘??’(6.6%) ‘???’(5.1%)? ?? ????. ??? 20?? 16.8%? ?? ?????, ??? 20? 5.1%, 30? 5.7%, 40? 9%? ??? ???? ?? ???. ???? 40? ??(12.7%)? ??(1.8%)? ??? ??.
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