美国持有学士学位的科学与工程技术方面的工作人才24%都是移民，而持有博士学位的工作人员比例高达47%。

They make up 24% of the U. s. science and engineering workforce holding bachelor 's degrees and 47% of science and engineering workers who have PhDs.

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日本超过65岁的退休人员和工作人员的比例由1980年的14%上升到2008年的34%，预计到2020年达到49%。

The ratio of Japanese aged over 65 to thoseof working age rose from 14% in 1980 to an estimated 34% in 2008. It is forecast to increaseto 49% by2020.

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高犯人的专业工作人员的比例，以及日益重视的结果，这种方法需要考虑。

With high inmate to professional staff ratio and the growing attention to outcomes, this approach needs to be considered.

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