58% (1979)

56% (1973)

68% (1976)

80% (1972)

39% (1971)

61% (1981)

70% (1975)

51% (1982)

63% (1979)

64% (1978)

58% (1976)

61% (1984)

82% (1974)

41% (1974)

54% (1973)

53% (1973)

46% (1973)

46% (1971)

71% (1971)

0% (1970)