63% (1980)

50% (1972)

20% (1971)

44% (1980)

56% (1972)

37% (1971)

59% (1972)

23% (1973)

10% (1971)

49% (1974)

44% (1973)

10% (1980)

53% (1973)

25% (1972)

56% (1977)

20% (1974)

0% (1974)

25% (1977)

25% (1971)

25% (1975)