79% (2002)

81% (1975)

81% (1978)

82% (2015)

81% (1999)

86% (2003)

73% (2011)

70% (2006)

73% (2009)

65% (2016)

63% (2008)

85% (1991)

88% (1982)

82% (1979)

89% (1980)

88% (1992)

80% (1990)

84% (2002)

97% (1996)

100% (1989)