69% (1975)

58% (1974)

48% (1979)

60% (1975)

57% (1970)

52% (1969)

45% (1969)

51% (1980)

32% (1977)

100% (1973)

63% (1970)

0% (1975)

54% (1972)

50% (1969)

20% (1972)

0% (1972)

60% (1968)

0% (1969)

48% (1971)

33% (1974)