80% (1997)

77% (1997)

80% (1987)

77% (1992)

79% (1990)

73% (1989)

71% (1984)

73% (1974)

76% (1991)

62% (1973)

65% (1979)

61% (1972)

56% (1975)

20% (1980)

66% (1970)

55% (1995)

40% (1983)

50% (1983)

57% (1976)

72% (1976)