73% (1971)

68% (1965)

57% (1980)

70% (1989)

75% (1967)

58% (1967)

55% (1992)

69% (2009)

84% (1974)

64% (1983)

66% (1976)

75% (1972)

55% (1976)

60% (1980)

72% (1975)

0% (1973)

62% (1990)

56% (1989)

64% (1973)

77% (1979)