62% (1976)

54% (1976)

48% (1973)

80% (1971)

60% (1974)

50% (1979)

63% (1975)

0% (1969)

56% (1980)

65% (1981)

47% (1972)

60% (1981)

65% (1981)

60% (1979)

0% (1975)

68% (1983)

60% (1982)

25% (1979)

65% (1982)

0% (1977)