59% (2001)

79% (2003)

64% (1999)

52% (2000)

53% (2003)

50% (1996)

55% (2001)

58% (2004)

60% (2003)

0% (1992)

71% (1997)

0% (1985)

0% (1991)

58% (2002)

0% (1995)

55% (1997)

60% (1994)

60% (1989)

0% (1992)

0% (1994)