83% (1997)

81% (2015)

80% (2004)

79% (1999)

82% (2004)

77% (2009)

71% (2000)

78% (2006)

79% (2021)

72% (2008)

72% (2014)

76% (1995)

77% (1995)

77% (2010)

70% (1997)

71% (1998)

75% (2009)

71% (2016)

77% (1989)

76% (2015)