75% (1934)

66% (1976)

61% (1986)

51% (2003)

59% (2004)

63% (1984)

62% (1994)

68% (1945)

56% (1996)

58% (2008)

65% (1975)

57% (1988)

56% (1988)

62% (2007)

72% (2015)

69% (1956)

73% (1955)

67% (1932)

71% (1937)

60% (2005)