53% (2015)

58% (1956)

57% (1970)

42% (2007)

52% (1950)

55% (2007)

69% (2009)

61% (1998)

46% (2011)

68% (1991)

64% (1999)

64% (1932)

57% (1985)

59% (1938)

80% (2008)

19% (2015)

61% (1953)

40% (1993)

60% (1993)

81% (1981)