69% (1971)

52% (1980)

67% (1982)

49% (1983)

50% (1976)

30% (1979)

55% (1981)

0% (1977)

34% (1981)

32% (1982)

65% (1972)

36% (1981)

50% (1982)

0% (1977)

52% (1981)

0% (1965)

0% (1975)