45% (1990)

69% (1979)

68% (1963)

70% (1962)

66% (1964)

61% (1966)

60% (1971)

66% (1972)

62% (1965)

68% (1969)

50% (1988)

59% (1983)

49% (1987)

53% (1985)

63% (1964)

69% (1965)

73% (1970)

27% (1971)

64% (1968)

59% (1975)