65% (1980)

62% (1967)

64% (1989)

59% (1973)

57% (1984)

68% (1991)

58% (1983)

45% (1986)

0% (1988)

65% (1987)

58% (1985)

56% (1993)

70% (1965)

63% (1961)

57% (1981)

76% (2003)

68% (1972)

50% (1963)

52% (1969)

44% (1992)