TABLE 25 Number of Postdocs Ever Held by Science and Engineering Ph.D.s, by Field of Doctorate and Years Since Doctorate, 1995 (in percent)

 

Field of Doctorate

Years Since Doctorate and Number of Postdocs

All Fields

Computer Sciences

Mathematical Sciences

Chemistry

Physics and Astronomy

Earth/Atmospheric/Marine Sciences

Agricultural/Environmental Sciences

Biological Sciences

Health Sciences

Social Sciences

Psychology

Engineering

Total Population (No.)

542,500

6,600

25,200

61,400

38,700

16,500

22,400

109,900

16,900

75,800

82,200

87,000

None

66.4

89.7

81.1

52.1

49.3

65.6

73.3

38.3

79.5

88.2

74.7

82.6

1

25.0

9.7

13.8

35.5

36.1

28.9

20.4

41.7

17.2

9.1

21.1

15.6

2

6.7

0.6

3.7

9.7

11.8

4.4

5.0

15.5

2.3

1.9

3.2

1.4

3 or More

1.9

0.0

1.4

2.7

2.7

1.1

1.4

4.5

0.9

0.7

1.0

0.4

5 Years or Less

104,200

3,400

3,800

9,200

6,100

3,200

3,800

21,200

5,000

12,400

16,000

20,100

None

59.6

87.9

69.7

39.0

28.4

49.9

55.9

29.1

78.8

90.1

71.4

73.4

1

32.0

11.0

19.0

50.6

50.2

41.2

34.6

51.8

19.4

8.8

25.0

23.9

2

7.2

1.1

7.7

9.6

19.1

6.5

7.5

17.0

1.4

1.0

2.4

2.4

3 or More

1.2

0.0

3.6

0.9

2.3

2.4

2.0

2.1

0.3

0.1

1.1

0.3

6-10 Years

88,800

2,000

3,000

8,700

5,000

2,500

3,500

17,400

3,500

11,400

14,500

17,200

None

63.4

92.1

81.0

44.1

38.9

54.1

64.7

27.5

81.7

91.2

73.1

81.1

1

26.8

7.8

14.3

42.1

40.9

34.9

28.5

46.6

16.0

6.4

23.0

16.5

2

7.7

0.1

4.7

11.9

15.6

9.1

6.3

19.8

1.2

1.9

2.8

2.0

3 or More

2.1

0.0

0.0

2.0

4.6

1.9

0.4

6.1

1.1

0.5

1.0

0.4

11-15 Years

78,600

*

3,000

7,400

4,500

2,300

3,800

17,000

2,900

12,200

15,400

9,400

None

65.0

*

81.4

54.0

48.6

60.4

73.2

32.0

77.0

85.9

74.1

85.7

1

25.8

*

12.8

35.8

37.2

34.8

17.2

43.8

20.1

12.3

22.1

12.5

2

7.3

*

3.3

8.3

12.1

3.3

7.9

18.9

2.6

1.7

3.6

0.9

3 or More

1.8

*

2.5

1.9

2.1

1.4

1.7

5.3

0.3

0.1

0.2

0.9



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