78% (2001)

65% (2007)

71% (1992)

78% (1999)

72% (1996)

73% (2001)

66% (2000)

72% (2004)

74% (1997)

69% (1995)

69% (2011)

71% (2002)

67% (2000)

67% (1996)

71% (1994)

76% (1996)

73% (2013)

63% (2004)

61% (1999)

73% (2004)