78% (1987)

73% (2011)

74% (1990)

68% (2009)

74% (1997)

74% (2011)

80% (1998)

58% (1992)

85% (1992)

68% (2005)

78% (2003)

72% (2015)

77% (2017)

80% (2003)

79% (2009)

71% (1987)

73% (2016)

73% (1999)

51% (2002)

59% (2013)