20% (1980)

0% (1975)

20% (1979)

60% (1988)

0% (1986)

52% (1982)

10% (1980)

0% (1977)

53% (1980)

62% (1994)

32% (1978)

30% (1983)

62% (1986)

42% (1979)

0% (1989)

50% (1985)

0% (1979)

80% (1981)

60% (1975)

0% (1978)