54% (1994)

40% (1982)

77% (1996)

76% (1986)

66% (1986)

79% (1984)

64% (1987)

62% (1991)

70% (1981)

61% (1977)

62% (1988)

48% (1974)

70% (1979)

67% (1983)

60% (1993)

62% (2000)

67% (1971)

62% (1996)

65% (1978)

65% (1986)