40% (1985)

49% (1987)

54% (1980)

44% (1980)

32% (1988)

50% (1985)

72% (1988)

40% (1983)

40% (1988)

64% (1986)

58% (1986)

55% (1985)

53% (1983)

59% (1986)

48% (1986)

52% (1984)

54% (1999)

39% (1986)

54% (1981)

50% (1988)