70% (1961)

60% (1994)

59% (1955)

78% (1989)

74% (1995)

67% (1983)

68% (2009)

40% (1958)

73% (1985)

82% (1999)

76% (2014)

78% (1970)

70% (1984)

70% (1979)

74% (1951)

71% (2013)

72% (1965)

71% (1970)

65% (1958)

65% (1999)