68% (1993)

58% (1994)

62% (2000)

60% (2004)

45% (1991)

59% (2003)

58% (2000)

45% (1992)

70% (2004)

52% (1991)

53% (1993)

80% (1995)

50% (1997)

55% (1993)

0% (2004)

68% (2001)

0% (1988)

69% (1997)

0% (2003)

0% (1998)