63% (1980)

50% (1972)

57% (1972)

25% (1971)

37% (1971)

53% (1973)

20% (1971)

23% (1973)

44% (1980)

25% (1977)

0% (1974)

59% (1972)

49% (1974)

44% (1973)

25% (1972)

54% (1977)

20% (1974)

10% (1980)

25% (1975)

10% (1971)