47% (1978)

0% (1979)

20% (1985)

95% (1985)

28% (1979)

56% (1987)

35% (1982)

38% (1983)

70% (1987)

62% (1982)

55% (1987)

60% (1983)

50% (1981)

43% (1984)

42% (1987)

0% (1973)

57% (1979)

48% (1987)

50% (1986)

68% (1984)