63% (1992)

72% (2002)

71% (2002)

78% (2004)

69% (1996)

70% (2003)

70% (2000)

59% (1995)

72% (2008)

72% (2003)

71% (1998)

62% (2004)

64% (2005)

64% (2004)

59% (2011)

61% (2003)

76% (2005)

71% (1999)

81% (2011)

74% (2007)