1940-45

324

22.6

272

18.0

87

7.5

68

3.4

1946-50

319

17.7

157

10.6

203

5.4

60

3.3

1951-55

292

16.0

95

6.3

89

4.9

25

1.3

1956-60

275

14.4

122

6.4

91

4.8

26

1.4

1961-65

259

14.0

95

5.1

91

4.9

18

1.0

1966

210

13.8

56

3.7

77

5.1

5

0.3

1967

192

13.4

45

3.1

49

3.4

12

0.8

1968

164

11.9

44

3.2

57

4.1

9

0.7

1969

126

9.3

48

3.5

54

4.0

5

0.4

1970

127

9.0

40

2.8

50

3.5

5

0.4

1971

125

8.8

47

3.3

57

4.0

4

0.3

1972

115

8.5

46

3.4

64

4.7

3

0.2

1973

124

9.3

26

2.0

53

4.0

3

0.3

1974

108

8.3

27

2.1

46

3.6

4

0.3

1975

138

10.5

20

1.5

54

4.1

1

0.1

1976

97

7.6

20

1.6

60

4.7

0

-

1977

52

4.2

10

0.8

47

3.8

2

0.2

1978

68

5.4

6

0.5

44

3.5

3

0.2

1979

72

5.8

14

1.1

58

4.6

2

0.2

1980

48

3.8

14

1.1

55

4.4

1

0.1

1981

69

5.7

30

2.4

52

4.3

1

0.1

1982

34

2.7

5

0.4

38

3.0

0

-

1983

43

3.4

5

0.4

41

3.3

0

-

1984

42

3.4

1

0.1

28

2.3

3

-

1985

37

2.9

1

0.1

33

2.6

0

-

1986

47

3.8

1

0.1

32

2.5

1

0.1

1987

36

3.0

1

0.1

25

2.0

0

-

1988

30

2.5

2

0.2

25

2.1

0

-

1989

33

2.6

0

-

18

1.4

4

0.3

1990

27

2.1

0

-

30

2.3

2

0.2

1991

32

2.7

1

0.1

16

1.3

1

0.1

1992

26

2.2

4

3.4

24

2.0

1

0.1

1993

35

3.0

3

0.3

25

2.2

1

0.1

1994

29

2.6

2

0.2

21

1.9

0

-

1995

28

2.6

1

0.1

9

0.8

1

0.1

1996

29

2.7

5

0.5

12

1.1

1

0.1

1997

19

1.9

0

-

18

1.8

0

-

1998

18

1.9

0

-

16

1.7

0

-

1999

16

1.7

2

0.2

7

0.7

1

0.1