?? ???? ???? ? ???? ?? ??? ???? ???.
??? 20?~40?? ‘5?~10? ? ??’?? ???. ???? ????? ??????? ?????? ?? 20~40? ?? 1000??? ‘?? ??? ???? ? ???? ???’? ????? ??? ?? 26%? ‘5?~10? ? ??’? ???.
??? ??? ???? ??? ???. ‘5?~10? ? ??’? 30?(30.8%)? ?? ?? ???. ‘10?~20? ? ??’? 23.1%? 2?, ‘3?~5? ? ??’(20.7%)? ‘3? ? ??’(17.1%)? ?? ???. ‘20? ? ??’? 8.4%.
20?? ‘3? ? ??’? 48.8%? ?? ???, ‘3?~5? ? ??’(22.5%)? ?? ????. ‘5?~10? ? ??’? 15.9%??? ‘10?~20? ? ??’(8.4%)? ‘20? ? ??’(4.5%)? ????? ???.
40?? ‘10?~20? ? ??’(33.1%)? ?? ?? ???. ?? ‘5?~10? ? ??’(31.3%), ‘3?~5? ? ??’(13.3%), ‘20? ? ??’(11.4%), ‘3? ? ??’(10.8%) ????.
???? ??? ‘5?~10? ? ??’(28.8%)?, ??? ‘3? ? ??’(24.8%)? ?? ?? ????. ??? ‘20? ? ??’? ??(10.4%)? ??(5.8%)?? ???.
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