67% (1970)

70% (1967)

70% (1980)

63% (1982)

62% (1981)

74% (1981)

70% (1965)

65% (1964)

62% (1968)

73% (1971)

52% (1980)

62% (1976)

67% (1964)

62% (1975)

54% (1982)

65% (1971)

61% (1966)

57% (1969)

55% (1972)

58% (1970)