70% (1974)

62% (1979)

69% (1975)

53% (1976)

0% (1979)

57% (1980)

58% (1974)

63% (1973)

62% (1980)

53% (1973)

47% (1975)

61% (1973)

72% (1982)

45% (1985)

62% (1984)

70% (1984)

67% (1972)

10% (1978)

41% (1978)

55% (1974)