Table C-1. Instances of Each Autism Etiology by Year of Publication (continued)

Year

Total for

Year

Allergy/

Immune

Biological

Environ-

mental

Genetic

Neuro-

logical

Psycho-

logical

'71

37

3

2

6

3

11

12

'72

25

3

1

1

3

13

14

'73

27

2

3

2

1

8

11

'74

41

1

1

3

5

16

15

'75

53

1

4

3

10

18

17

'76

34

2

1

4

4

14

9

'77

39

2

3

10

14

10

'78

37

2

2

4

7

14

8

'79

48

6

4

10

6

10

12

'80

23

3

2

5

2

6

5

'81

35

1

2

3

4

19

6

'82

31

2

3

2

4

14

6

'83

53

2

4

5

7

18

17

'84

52

2

3

4

12

24

7

'85

51

4

5

2

17

15

8

'86

71

4

8

4

20

23

12

'87

42

5

7

4

5

13

8

'88

48

5

4

3

14

16

6

'89

56

3

4

3

13

21

12

'90

79

9

9

6

17

32

6

'91

82

5

5

9

23

27

13

'92

74

4

2

5

20

30

13

'93

72

5

3

4

19

26

15

'94

99

6

10

4

32

36

11

'95

72

5

3

2

15

32

15

'96

95

11

5

7

18

37

17

All

1,543

104

103

114

305

551

366


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