58% (1983)

23% (1987)

52% (1988)

60% (1986)

62% (1988)

50% (1989)

44% (1990)

20% (1994)

32% (1991)

54% (1988)

43% (1984)

54% (1985)

45% (1985)

53% (1986)

28% (1986)

55% (1986)

67% (1991)

0% (1993)

10% (1985)

10% (1985)