74% (2015)

85% (2017)

81% (2011)

81% (2016)

73% (2013)

76% (2009)

74% (2015)

87% (2013)

74% (2016)

83% (1999)

81% (1994)

75% (1987)

79% (2005)

81% (2018)

85% (2018)

78% (1994)

78% (2007)

85% (1992)

78% (2003)

73% (2002)