48% (1982)

56% (1973)

34% (1989)

72% (1988)

51% (1978)

57% (1979)

53% (1987)

52% (1983)

20% (1981)

30% (1988)

56% (1987)

43% (1978)

0% (1972)

28% (1979)

0% (1976)

65% (1977)

44% (1974)

65% (1975)

64% (1987)

52% (1987)