64% (1996)

68% (2005)

51% (2013)

72% (2014)

84% (1999)

84% (1997)

68% (2013)

58% (2009)

75% (2011)

83% (2004)

67% (1998)

69% (2001)

62% (2002)

75% (2014)

77% (2012)

72% (2007)

60% (1999)

66% (2013)

72% (2003)

59% (2015)