42% (1982)

57% (1984)

68% (1991)

50% (1984)

58% (2000)

62% (1965)

58% (1984)

53% (1987)

88% (1989)

65% (1957)

70% (1976)

50% (1984)

63% (1950)

70% (1975)

55% (1977)

58% (1969)

60% (1963)

50% (1965)

65% (1967)

72% (1982)