77% (2015)

55% (2008)

59% (2006)

52% (2012)

72% (2017)

55% (1976)

70% (2010)

68% (2015)

60% (2012)

66% (1985)

58% (2007)

57% (2008)

66% (2006)

68% (2013)

52% (2005)

76% (1999)

63% (2010)

65% (2017)

72% (2008)

74% (1994)