0% (1973)

72% (1977)

52% (1987)

0% (1986)

51% (1985)

28% (1979)

62% (1980)

0% (1981)

69% (1986)

48% (1987)

52% (1980)

50% (1978)

56% (1973)

60% (1980)

51% (1978)

57% (1979)

60% (1986)

0% (1977)

0% (1983)

35% (1989)