73% (1982)

74% (1964)

72% (1974)

66% (1977)

62% (1967)

70% (1969)

71% (1970)

65% (1980)

54% (1999)

62% (1977)

66% (1976)

64% (1979)

53% (1975)

50% (1966)

64% (1976)

66% (1979)

67% (1982)

67% (1974)

58% (1977)

78% (1987)