71% (1988)

20% (1991)

66% (1988)

30% (1988)

68% (1988)

30% (1988)

40% (1988)

41% (1986)

58% (1987)

20% (1989)

80% (1994)

63% (1986)

64% (1991)

51% (1987)

41% (1990)

54% (1988)

63% (1987)

66% (1987)

55% (1987)

52% (1987)