68% (1993)

62% (2000)

61% (2004)

58% (1994)

60% (2000)

45% (1991)

60% (2003)

47% (1992)

68% (2001)

52% (1991)

68% (1997)

0% (1997)

53% (1993)

0% (1996)

55% (2002)

50% (1997)

55% (1993)

0% (2001)

20% (1995)

62% (2000)