??? 20～40?? ????? ?? ???? ‘???? ?? ??’? ?? ?? ???.
?? ?????? ??????? ?????? ?? 20～40? ?? 1000??? ‘???? ???’? ????? ?? ??? ?? 26.6%? ???? ?? ??? ???. ??? ???? ? ??? ??? ???? ??? 20?(13.2%) 30?(18.6%) 40?(33.7%)? ??? ??? ?? ???.
‘?? ???’? ?? 25.6%? ????? ??? 38.8%? ?? 12.4%? ?? ?? ???. ?? ??? ??? ????, ??? 20?(15%) 30?(14.4%) 40?(7.8%)? ???? ‘??’? ?? ??? ???.
??? ‘??(??)’(23.4%) ‘??’(22.8%) ‘???? ????’(21.8%)? ???? ?? ?? ??(??)? ?? ??? 3%? ????.
?????? ?? ???? ‘??’(18.7%) ‘??(??)’(13.2%) ‘??? ???’(9.1%) ‘???’(6.8%) ????.
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