57% (1975)

0% (1976)

57% (1974)

56% (1976)

60% (1972)

60% (1973)

60% (1979)

63% (1974)

58% (1974)

68% (1977)

67% (1974)

55% (1975)

60% (1973)

55% (1972)

49% (1976)

33% (1977)

68% (1974)

60% (1974)

66% (1973)

50% (1974)