70% (1993)

77% (1988)

64% (1983)

69% (1991)

70% (1995)

75% (1995)

71% (1983)

63% (1994)

56% (1993)

68% (1989)

63% (1985)

77% (1988)

65% (1991)

68% (1992)

65% (1985)

81% (1991)

43% (1989)

56% (1989)

72% (1986)

80% (1989)