62% (1987)

81% (1992)

43% (1987)

73% (1984)

69% (1985)

70% (1975)

58% (1977)

65% (1984)

74% (1975)

47% (1981)

70% (1989)

68% (1981)

71% (1989)

50% (1975)

48% (1993)

64% (1976)

61% (1996)

0% (1994)

72% (1989)

42% (1993)