54% (1994)

71% (1978)

63% (1950)

62% (1997)

59% (2006)

69% (1988)

73% (1941)

61% (1967)

67% (1966)

59% (1985)

67% (1982)

70% (1973)

70% (1974)

73% (2014)

61% (1964)

73% (1979)

60% (2008)

64% (1983)

68% (1998)

71% (1941)