74% (1962)

54% (2014)

80% (1999)

59% (2014)

59% (1982)

77% (2013)

84% (2014)

85% (2012)

76% (2001)

74% (1990)

65% (1998)

38% (1947)

70% (1959)

75% (1976)

86% (2005)

55% (1992)

60% (2009)

69% (1975)

85% (1994)

81% (1993)