57% (1972)

63% (1980)

53% (1972)

30% (1973)

20% (1971)

28% (1972)

48% (1972)

54% (1977)

48% (1973)

20% (1971)

44% (1980)

0% (1976)

30% (1971)

0% (1974)

20% (1972)

20% (1977)

42% (1973)

49% (1974)

10% (1980)

25% (1975)