58% (1983)

23% (1987)

52% (1988)

60% (1986)

62% (1988)

44% (1990)

20% (1994)

43% (1984)

50% (1989)

54% (1985)

32% (1991)

10% (1985)

54% (1988)

35% (1987)

45% (1985)

28% (1986)

48% (1988)

55% (1986)

57% (1987)

53% (1986)