63% (1974)

68% (1974)

56% (1976)

30% (1974)

55% (1973)

64% (1973)

57% (1975)

60% (1973)

57% (1974)

67% (1974)

55% (1972)

72% (1976)

49% (1976)

60% (1974)

52% (1972)

0% (1976)

68% (1977)

36% (1973)

47% (1978)

60% (1973)