37% (1976)

58% (1967)

58% (1981)

45% (1971)

43% (1982)

52% (1960)

50% (1963)

70% (1963)

60% (1979)

41% (1981)

60% (1961)

50% (1978)

58% (1990)

38% (1964)

35% (1982)

50% (1987)

65% (1974)

51% (1985)

62% (1985)

58% (1961)