46% (1986)

53% (1976)

70% (1968)

44% (1973)

62% (1971)

48% (1966)

0% (1972)

53% (1973)

59% (1973)

52% (1968)

64% (1972)

63% (1970)

59% (1965)

53% (1971)

69% (1963)

61% (1970)

57% (1976)

48% (1968)

35% (1972)

0% (1967)