78% (2009)

60% (2005)

85% (2005)

81% (2002)

69% (1996)

53% (2003)

77% (2007)

66% (2008)

78% (2010)

74% (2008)

60% (2000)

61% (2001)

78% (2006)

82% (2004)

61% (2000)

53% (2000)

60% (2005)

72% (2007)

95% (2006)

72% (2010)