56% (1976)

71% (1975)

34% (1978)

66% (1974)

54% (1975)

52% (1975)

67% (1976)

39% (1975)

53% (1974)

50% (1974)

54% (1974)

48% (1974)

20% (1977)

23% (1979)

10% (1976)

30% (1974)

20% (1974)

0% (1975)