55% (1979)

60% (1955)

64% (1981)

66% (1972)

64% (1938)

61% (1971)

52% (1983)

58% (1967)

54% (1979)

61% (1984)

49% (1975)

49% (1976)

46% (1982)

60% (1963)

59% (2001)

68% (1963)

68% (1949)

56% (1979)

59% (1974)

59% (2002)