70% (1988)

73% (1986)

72% (1996)

77% (1988)

57% (1989)

53% (1995)

68% (1997)

57% (1989)

70% (1992)

10% (1988)

50% (1984)

64% (1995)

80% (1989)

0% (1985)

40% (1986)

0% (1988)

40% (1993)

0% (1987)

50% (1987)

72% (1988)