51% (1985)

63% (1972)

63% (1972)

54% (1966)

45% (1978)

59% (1980)

61% (1971)

37% (1972)

50% (1974)

50% (1973)

62% (1951)

20% (1973)

0% (1971)

0% (1951)

53% (1977)

52% (1981)