53% (1976)

70% (1968)

46% (1986)

44% (1973)

69% (1963)

35% (1972)

58% (1976)

53% (1973)

61% (1970)

51% (1968)

64% (1972)

59% (1973)

59% (1965)

53% (1971)

62% (1971)

47% (1966)

60% (1968)

63% (1970)

48% (1968)

55% (1970)