70% (2003)

79% (2013)

71% (1996)

85% (2001)

78% (2010)

65% (2017)

71% (2011)

80% (2005)

77% (2004)

75% (2002)

66% (2012)

70% (2009)

65% (2002)

74% (2001)

59% (2000)

70% (1998)

66% (2001)

51% (2004)

83% (2001)

71% (2007)