78% (2002)

78% (2008)

69% (2002)

66% (1999)

70% (2009)

76% (2003)

71% (2007)

69% (1997)

65% (2005)

66% (2001)

72% (2008)

61% (2000)

51% (2005)

74% (2004)

60% (2006)

64% (2003)

71% (2013)

63% (2010)

70% (1996)

60% (2003)