72% (1950)

73% (1959)

69% (2000)

72% (1962)

64% (1943)

75% (1936)

68% (1984)

49% (2004)

69% (1998)

50% (1994)

67% (1993)

59% (1980)

69% (1976)

60% (1981)

43% (2011)

53% (1983)

63% (1955)

68% (1965)

60% (1975)

69% (1972)