62% (2015)

61% (2015)

77% (1997)

75% (1999)

72% (2003)

71% (2000)

50% (2003)

70% (2010)

70% (2004)

64% (2010)

77% (2006)

74% (2001)

76% (2002)

61% (2005)

67% (2006)

69% (2004)

63% (2007)

62% (2000)

72% (2008)

63% (2010)