26% (1997)

67% (1972)

64% (1955)

61% (1955)

51% (2002)

73% (1969)

65% (1961)

80% (1990)

67% (1984)

0% (1956)

77% (1978)

77% (1975)

70% (1967)

71% (1981)

72% (1992)

73% (1970)

82% (1973)

50% (1968)

78% (1988)

74% (1971)