78% (2001)

73% (2001)

71% (1992)

77% (1999)

65% (2000)

73% (1996)

65% (2007)

69% (2011)

74% (1997)

73% (2013)

66% (2002)

72% (2004)

71% (2002)

69% (1995)

67% (2000)

71% (1994)

64% (2003)

73% (2004)

68% (1995)

55% (2002)