64% (1980)

37% (1971)

48% (1972)

59% (1972)

49% (1974)

54% (1977)

0% (1974)

53% (1973)

20% (1971)

44% (1980)

25% (1971)

30% (1973)

25% (1972)

10% (1971)

44% (1973)

10% (1980)

25% (1977)

57% (1972)

20% (1974)

25% (1975)