47% (1986)

70% (1968)

44% (1973)

53% (1976)

53% (1973)

59% (1973)

69% (1963)

63% (1970)

62% (1971)

47% (1972)

48% (1966)

59% (1968)

52% (1968)

59% (1965)

64% (1972)

65% (1966)

61% (1970)

34% (1966)

40% (1967)

0% (1972)