85% (1986)

0% (1988)

56% (1980)

85% (1988)

0% (1985)

60% (1968)

100% (1977)

60% (1976)

68% (1972)

48% (1977)

80% (1985)

47% (1981)

34% (1987)

50% (1985)

70% (1972)

0% (1989)

51% (1983)

0% (1983)

70% (1987)

0% (1983)