0% (1976)

40% (1981)

40% (1980)

60% (1977)

40% (1980)

40% (1980)

0% (1988)

65% (1985)

35% (1980)

40% (1977)

50% (1986)

45% (1980)

67% (1980)

40% (1977)

40% (1974)

40% (1980)

40% (1975)

47% (1977)