72% (2011)

42% (1991)

81% (2001)

69% (2015)

77% (2013)

79% (2007)

0% (2010)

85% (2011)

71% (1986)

55% (1981)

78% (2006)

69% (2007)

59% (2011)

95% (1994)

59% (1952)

71% (2006)

72% (2012)

57% (1992)

64% (2001)

80% (2009)