60% (1973)

56% (1976)

63% (1974)

30% (1974)

68% (1974)

57% (1974)

57% (1975)

55% (1973)

67% (1974)

49% (1976)

55% (1974)

0% (1979)

58% (1974)

60% (1973)

55% (1972)

50% (1974)

64% (1973)

47% (1978)

68% (1972)

60% (1974)