然而，当前物种的大规模灭绝不光是人口数目激增造成的。
Yet sheer Numbers do not totally explain the current mass extinction.
剩余的床位远少于老年人口数目的2%，而发达国家这个数字通常是5 - 7%。
There are rest home beds for less than 2% of the elderly population, compared with a developed world standard of 5-7%.
近在1990年，日本适龄劳动人口数目和儿童及老人数目的比例是七比三。
As recently as 1990, working-age Japanese outnumbered children and the elderly by seven to three.
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