69% (1989)

78% (1993)

71% (2002)

65% (1991)

67% (2000)

52% (1997)

57% (1987)

50% (1990)

50% (1993)

54% (1991)

50% (1990)

55% (1994)

0% (1996)

60% (1995)

71% (1993)

60% (1986)

63% (1992)

59% (1990)

100% (1990)

50% (1984)