69% (1993)

58% (1994)

62% (2000)

61% (2004)

57% (2000)

90% (1995)

38% (1992)

68% (1997)

59% (2003)

46% (1991)

68% (2001)

0% (1991)

50% (1997)

52% (1991)

67% (1995)

55% (1993)

0% (2002)

20% (1995)

70% (1996)

55% (2002)