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Ⅱ 調査結果の特徴2013/12/20 · 12.6% 10.8% 8.1% 男子 15~30分未満 30~45分未満 45~60分未満 1~15分未満 0分 47.6% 16.5% 12.9% 13.7% 9.3%
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