60% (1987)

0% (1987)

40% (1986)

0% (1989)

50% (1989)

0% (1972)

0% (1980)

0% (1980)

0% (1982)

65% (1979)

60% (1981)

0% (1967)

60% (1989)

70% (1980)

60% (1980)

50% (1985)

64% (1988)

85% (1979)

0% (1979)

70% (1983)