62% (2009)

68% (2006)

64% (1998)

58% (2003)

61% (2007)

50% (2001)

58% (2002)

65% (2007)

45% (2000)

40% (2003)

70% (2000)

64% (2008)

60% (2004)

55% (2002)

0% (1997)

0% (1999)

0% (2003)

70% (2005)

0% (2005)

57% (1996)