51% (2002)

79% (1990)

73% (1969)

78% (1988)

82% (1973)

71% (1988)

26% (1997)

72% (1992)

71% (1981)

66% (1972)

77% (1975)

70% (1983)

70% (1973)

61% (1955)

64% (1955)

83% (1980)

64% (1979)

67% (1982)

74% (1971)

80% (1983)