61% (1989)

57% (1992)

55% (1986)

57% (1998)

53% (1997)

47% (1984)

50% (1993)

68% (1986)

50% (1994)

73% (1985)

60% (1988)

60% (1987)

0% (1987)

69% (1993)

64% (1988)

100% (1993)

87% (1991)

50% (1990)

43% (1994)

70% (1995)