0% (1975)

58% (1973)

55% (1979)

50% (1979)

52% (1989)

68% (1980)

69% (1974)

65% (1982)

10% (1988)

70% (1979)

63% (1972)

54% (1975)

0% (1977)

0% (1980)

49% (1982)

40% (1983)

51% (1986)

60% (1979)

0% (1980)

0% (1979)