45% (1990)

69% (1979)

66% (1964)

68% (1963)

53% (1985)

70% (1962)

69% (1965)

60% (1971)

73% (1970)

66% (1972)

58% (1983)

69% (1971)

61% (1966)

69% (2006)

64% (1968)

62% (1965)

63% (1964)

61% (1965)

56% (1966)

50% (1988)