我还做了另外一个数据，就是人口数，而美国的人口数量一直都很平稳，粉色的那条线看起来非常平稳，我还做了利率的数据。
The other thing I have down is population, although the population of the U.S. has been pretty steady -that pink line looks awfully steady -and I have interest rates.
美国人口统计局预计在未来四十年内，美国的人口会增长40%，增量相当于整个日本的人口数量。
The Census Bureau expects the population to grow by 40% over the next four decades, equivalent to the entire population of Japan.
但是，中国的人口数量，是美国、欧洲、日本、澳大利亚和俄罗斯等所有发达国家的总和。
But China has as many people as the combined populations of all developed countries including the us, Europe, Japan, Australia and Russia.
如今，美国60岁以上的人口数量首次超过15岁以下的人。
There are now, for the first time, more Americans over the age of 60 than under the age of 15.
如今，美国60岁以上的人口数量首次超过15岁以下的人。
There are now, for the first time, more Americans over the age of 60 than under the age of 15.
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