80% (1974)

53% (1985)

50% (1970)

60% (1965)

60% (1978)

40% (1971)

20% (1980)

50% (1960)

60% (1990)

0% (1977)

0% (1962)

0% (1985)

0% (1979)

0% (1978)

0% (1965)

20% (1989)

45% (1980)

0% (1986)

0% (1965)

0% (1975)