63% (1974)

56% (1976)

60% (1973)

57% (1975)

30% (1974)

55% (1973)

68% (1974)

57% (1974)

49% (1976)

67% (1974)

0% (1979)

58% (1974)

60% (1973)

64% (1973)

47% (1978)

50% (1974)

55% (1974)

72% (1976)

55% (1972)

0% (1986)