80% (2017)

65% (2013)

74% (2008)

76% (2013)

70% (1970)

60% (2006)

59% (2005)

71% (2003)

63% (2018)

66% (1978)

68% (2008)

61% (2017)

66% (2008)

64% (1953)

68% (2012)

64% (2016)

53% (1996)

58% (2014)

61% (2005)

59% (2013)