70% (1971)

52% (1980)

48% (1983)

30% (1981)

67% (1982)

32% (1982)

50% (1976)

40% (1981)

55% (1981)

50% (1982)

0% (1972)

0% (1975)

30% (1979)

52% (1981)

0% (1977)

0% (1977)