78% (2001)

71% (1992)

73% (2001)

75% (1997)

73% (2013)

77% (1999)

72% (1996)

67% (2000)

65% (2007)

74% (2004)

72% (2004)

69% (2011)

66% (2013)

65% (2000)

66% (2002)

69% (2013)

71% (1994)

55% (1997)

55% (2002)

69% (1995)