51% (1985)

45% (1978)

63% (1972)

37% (1972)

63% (1972)

50% (1974)

54% (1966)

61% (1971)

20% (1973)

59% (1980)

0% (1971)

62% (1951)

50% (1977)

74% (1969)

50% (1973)

80% (1951)

52% (1981)