76% (1985)

68% (1973)

81% (1975)

40% (1969)

56% (1989)

60% (1978)

65% (1975)

64% (1973)

60% (1975)

72% (1975)

55% (1992)

62% (1990)

60% (1976)

63% (1989)

62% (2004)

55% (1976)

60% (1980)

70% (1977)

0% (1973)

70% (1978)