60% (2001)

63% (1999)

79% (2003)

55% (2001)

51% (2000)

71% (1997)

0% (1992)

0% (1995)

58% (2002)

42% (1998)

60% (1994)

0% (1995)

53% (2003)

0% (1992)

60% (2003)

45% (1988)

58% (2004)

0% (1991)

0% (1993)

60% (1989)