52% (1986)

58% (1979)

63% (1973)

65% (1982)

51% (1985)

56% (1962)

46% (1985)

73% (1968)

48% (1984)

60% (1953)

34% (1990)

77% (1968)

43% (1969)

0% (1987)

61% (1980)

60% (1964)

52% (1958)

64% (1970)

65% (1970)

60% (1956)