69% (1990)

45% (1990)

55% (1994)

63% (1990)

56% (1989)

49% (1990)

42% (1990)

42% (1991)

51% (1991)

23% (1992)

42% (1993)

54% (1984)

38% (1992)

39% (1991)

47% (1992)

49% (1989)

60% (1993)

40% (1992)

55% (1993)

30% (1993)