82% (1997)

84% (1999)

78% (2001)

73% (2006)

74% (2013)

79% (2004)

85% (2018)

80% (2009)

59% (2009)

73% (1994)

79% (1999)

73% (2011)

80% (1972)

76% (1990)

76% (1981)

70% (1993)

80% (2003)

58% (2008)

76% (2000)

65% (2001)