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Image: John Walker [CC BY 2.0], via Flickr
US universities awarded more than 55,000 doctorates in 2015, the highest number ever reported, according to figures from the National Science Foundation.
The NSF annual survey of earned doctorates found the number of PhDs awarded in 2015 increased by almost 2 percent compared with the year before, extending a pattern of continuous growth since 1957.
Nearly three-quarters of those degrees were granted in science and engineering, accounting for essentially all of the growth in the number of PhDs granted. The report found that the number of non-science and engineering doctorates awarded has been virtually unchanged since 1975.