71% (1933)

54% (1985)

61% (1968)

59% (1982)

56% (1992)

69% (1972)

74% (1968)

58% (1978)

52% (1989)

60% (1959)

71% (1969)

64% (1955)

56% (1968)

65% (1958)

59% (1987)

62% (1998)

28% (2004)

53% (1986)

63% (1964)

67% (1952)