题目内容
据北京市统计，截止到1981年底，全市16岁以下的少年儿童总数为2272194人。其中，学龄前儿童739616人，占其总数的33.55%。另据有关统计资料，在我国目前抚养一个婴儿到16岁，农村平均需要1600元，城市平均需要6900元，全国平均2200元。1981年北京市儿童消费主要体现在吃、穿、玩具等。不同年龄消费费用不同。在婴儿期内食品支出占支出总额的81.5%；在幼儿期内占 81.2%；在学龄前期占77.9%；在学龄期内占71.4%。在服装方面，学龄前儿童支出大体维持在总消费金额的13%左右，但进入学龄期后，占总体的21.8%。 截止到1981年底，北京市16岁以下，学龄期以上的儿童占16岁以下的儿童比例为（）。
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