70% (1992)

58% (2008)

78% (2004)

38% (2000)

50% (2003)

54% (2005)

55% (2009)

64% (1999)

70% (2010)

62% (2001)

20% (1997)

0% (2006)

59% (2002)

50% (2009)

0% (2005)

70% (1998)

33% (2008)

42% (2002)

0% (2006)

80% (2004)