75% (2006)

69% (2007)

63% (2007)

58% (2005)

59% (2004)

58% (2003)

57% (2004)

53% (2001)

61% (1998)

52% (2008)

32% (2006)

76% (2001)

54% (2001)

0% (2002)

22% (2008)

0% (1998)

90% (2004)

0% (2001)

40% (2004)

100% (2000)