77% (1988)

70% (1993)

69% (1991)

65% (1985)

56% (1993)

71% (1983)

56% (1989)

82% (1991)

0% (1988)

70% (1995)

64% (1983)

63% (1994)

77% (1988)

63% (1985)

75% (1995)

65% (1991)

68% (1989)

68% (1992)

56% (1984)

72% (1986)