46% (1986)

53% (1976)

70% (1968)

59% (1973)

69% (1963)

43% (1973)

58% (1976)

53% (1973)

48% (1968)

63% (1972)

62% (1971)

48% (1968)

63% (1970)

59% (1968)

48% (1966)

59% (1965)

35% (1972)

53% (1971)

0% (1967)

47% (1972)