74% (2015)

71% (2016)

79% (1996)

59% (1982)

57% (2015)

77% (2004)

80% (2012)

71% (1983)

80% (2008)

68% (1993)

67% (2005)

83% (2005)

76% (2001)

80% (1951)

66% (2003)

51% (1956)

61% (1989)

59% (1992)

55% (1982)

63% (1999)