26% (1997)

66% (1972)

0% (1956)

61% (1955)

64% (1955)

53% (2002)

80% (1990)

70% (1967)

76% (1972)

78% (1975)

73% (1971)

72% (1992)

58% (1992)

65% (1961)

73% (1969)

73% (1970)

82% (1973)

78% (1988)

0% (1983)

67% (1984)