28% (1979)

52% (1980)

70% (1977)

56% (1975)

52% (1987)

62% (1974)

70% (1987)

40% (1972)

60% (1975)

65% (1989)

65% (1980)

0% (1979)

0% (1980)

0% (1983)

54% (1974)

57% (1979)

0% (1972)

40% (1981)

0% (1978)

56% (1989)