76% (1973)

70% (1970)

73% (1966)

71% (1967)

78% (1969)

73% (1965)

73% (1966)

70% (1965)

70% (1963)

76% (1978)

79% (1967)

56% (1982)

75% (1979)

70% (1990)

78% (1976)

69% (1963)

77% (1970)

73% (1981)

80% (1983)

69% (1972)