1963

1964

1965

1966

1967

1968

1969

1970

1971

1972

1973

1974

1975

1976

1977

1978

1979

Total US & perms

1129

1268

1427

1603

1837

2166

2468

2771

3071

3043

3087

2856

3032

3071

2995

3063

3188

%

85.6

84.0

83.1

83.7

85.8

86.6

87.6

88.4

89.0

89.4

89.8

85.6

89.0

88.2

88.3

88.8

89.6

Temp visas staying in US

77

80

91

119

125

131

129

128

101

94

94

121

120

130

114

121

115

%

5.8

5.3

5.3

6.2

5.8

5.2

4.6

4.1

2.9

2.8

2.7

3.6

3.5

3.7

3.4

3.5

3.2

Temp visas leaving US

76

97

123

103

95

110

129

146

123

128

124

123

114

113

121

108

110

%

5.8

6.4

7.2

5.4

4.4

4.4

4.6

4.7

3.6

3.8

3.6

3.7

3.3

3.2

3.6

3.1

3.1

Total temporary residents

181

214

273

279

269

304

309

333

284

269

269

307

285

301

297

284

272

%

13.7

14.2

15.9

14.6

12.6

12.2

11.0

10.6

8.2

7.9

7.8

9.2

8.4

8.6

8.8

8.2

7.6

Postdoctoral appointments

404

483

589

668

759

949

1121

1406

1495

1516

1552

1459

1756

1833

1826

1938

2030

%

30.6

32.0

34.3

34.9

35.5

37.9

39.8

44.8

43.3

44.6

45.2

43.7

51.5

52.6

53.8

56.2

57.0

Time to degree

 

 

 

 

 

 

 

6.0

6.0

6.0

6.2

6.3

6.1

6.3

6.3

6.4

6.5

Median age at time of degree

 

 

 

 

 

 

 

29.1

29.1

29.4

29.7

29.6

29.4

29.4

29.4

29.6

29.6



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