Table 5.1Age distribution of US PhD life-science faculty in 1975, 1985, and 1995

1975 Survey1985 Survey1995 Survey
Age, YearsNo.%Cumulative %No.%Cumulative %No.%Cumulative %
27–2850.0020.00.0
29–301320.60.6130.00.01220.30.3
31–329124.14.73290.91.04711.11.3
33–3420939.314.012953.64.68812.03.3
35–36321814.328.320675.810.416643.87.1
37–38286812.841.125237.117.425335.712.8
39–40241010.751.8366810.327.733247.520.3
41–4220028.960.7377210.638.337268.428.7
43–4418828.469.133539.447.738178.637.4
45–4618658.377.4388610.958.532747.444.8
47–4814216.383.729778.366.938218.653.4
49–5012685.689.323536.673.537008.461.7
51–526993.192.417825.078.432677.469.1
53–545952.695.119715.584.035107.977.0
55–563881.796.816684.788.629136.683.6
57–582761.298.113663.892.520694.788.3
59–601640.798.811243.195.615013.491.7
61–621230.599.35511.597.115673.595.2
63–64860.499.75771.698.810792.497.7
65–66540.2100.01900.599.36261.499.1
67–6860.0100.01670.599.82640.699.7
69–7000.0100.0610.299.9610.199.8
71–7200.0100.0240.1100.0670.2100.0
73–7400.0100.010.0100.080.0100.0
75+00.0100.000.0100.040.0100.0
22,46735,71844,271

From: 5, Implications of the Findings

Cover of Trends in the Early Careers of Life Scientists
Trends in the Early Careers of Life Scientists.
National Research Council (US) Committee on Dimensions, Causes, and Implications of Recent Trends in the Careers of Life Scientists.
Washington (DC): National Academies Press (US); 1998.
Copyright © 1998, National Academy of Sciences.

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