76% (1997)

40% (1972)

81% (1989)

81% (2010)

52% (1960)

74% (2011)

67% (1979)

81% (2013)

67% (1984)

77% (1961)

77% (2004)

50% (1964)

74% (2014)

82% (2004)

70% (1992)

73% (1962)

70% (1986)

34% (1999)

78% (1987)

59% (2002)