58% (1988)

43% (1980)

60% (1975)

65% (1978)

0% (1975)

70% (1986)

0% (1982)

0% (1985)

0% (1974)

35% (1971)

10% (1982)

0% (1976)

0% (1971)

0% (1980)

50% (1980)

0% (1986)

53% (1978)

51% (1979)

40% (1980)

0% (1986)