51% (1973)

48% (1955)

63% (1988)

63% (1968)

55% (1991)

42% (1959)

47% (1983)

62% (1966)

52% (1951)

32% (1960)

39% (1986)

74% (1971)

0% (1972)

35% (1981)

54% (1990)

30% (1984)

50% (1939)

49% (1972)

48% (1980)

38% (1956)