76% (2016)

81% (2006)

75% (1988)

20% (1987)

78% (2010)

81% (2007)

78% (2013)

73% (1995)

69% (2015)

40% (2012)

80% (2014)

50% (2015)

81% (2009)

79% (2002)

80% (1973)

10% (2003)

74% (1998)

76% (2013)

100% (2012)

50% (1996)