68% (2014)

70% (1964)

76% (1960)

74% (1973)

74% (1965)

61% (1979)

64% (1970)

63% (1965)

73% (1966)

70% (1983)

69% (1967)

55% (1968)

70% (1973)

70% (1963)

61% (1972)

54% (1971)

70% (1970)

48% (1981)

58% (1935)

63% (1970)