86% (2001)

84% (2004)

81% (1988)

84% (1997)

75% (2023)

79% (1989)

78% (2008)

77% (2010)

80% (1986)

80% (1995)

78% (1992)

78% (2013)

80% (2014)

65% (1993)

72% (2002)

81% (2013)

72% (1994)

76% (2011)

75% (2016)

66% (2006)