75% (1944)

70% (1998)

72% (1995)

63% (1991)

65% (2004)

52% (1998)

69% (1964)

61% (1986)

71% (1982)

67% (1978)

74% (1982)

73% (1956)

61% (2000)

64% (2005)

72% (1992)

71% (1961)

72% (2015)

60% (2004)

50% (1967)

68% (2004)