78% (2009)

81% (2002)

85% (2005)

60% (2005)

69% (1996)

53% (2003)

61% (2001)

77% (2007)

66% (2008)

78% (2010)

74% (2008)

60% (2000)

72% (2007)

53% (2000)

82% (2004)

61% (2000)

60% (2005)

95% (2006)

78% (2006)

72% (2010)