86% (2018)

77% (2003)

82% (2006)

80% (1999)

90% (2008)

83% (2005)

74% (1990)

81% (2005)

77% (2013)

76% (1997)

77% (2000)

83% (2005)

85% (2016)

76% (2009)

80% (2015)

80% (1996)

84% (2008)

82% (2003)

69% (2012)

78% (2010)