65% (1976)

70% (1978)

48% (1980)

65% (1975)

72% (1984)

65% (1977)

80% (1970)

82% (2009)

78% (1981)

63% (1964)

62% (1951)

48% (1988)

78% (1976)

70% (1997)

78% (1984)

68% (1971)

60% (1946)

63% (1989)

65% (1981)

55% (2001)