80% (1997)

72% (2014)

83% (1977)

85% (1999)

76% (2009)

76% (1987)

82% (1979)

74% (2002)

79% (2014)

77% (2016)

70% (2005)

74% (2006)

74% (2008)

63% (2010)

68% (2015)

70% (2017)

68% (2004)

79% (2017)

76% (2014)

57% (2018)