76% (2009)

73% (1974)

72% (2012)

83% (1988)

72% (2016)

79% (2014)

73% (1966)

68% (1959)

65% (1981)

70% (1958)

60% (2005)

73% (1975)

68% (1957)

75% (1957)

72% (1963)

65% (1995)

75% (1981)

69% (1979)

74% (1960)

76% (2011)