54% (1972)

48% (1972)

64% (1980)

30% (1973)

20% (1971)

44% (1980)

54% (1977)

49% (1974)

58% (1972)

10% (1980)

30% (1971)

44% (1973)

43% (1973)

20% (1977)

20% (1972)

20% (1971)

10% (1971)

0% (1974)

25% (1975)

20% (1974)