76% (1960)

62% (1979)

69% (1982)

71% (1963)

69% (1963)

69% (1977)

66% (1967)

58% (1990)

70% (1963)

64% (1997)

83% (1960)

66% (1987)

68% (1999)

78% (1971)

70% (1998)

64% (1971)

75% (1932)

66% (1969)

80% (1980)

73% (1979)