69% (1990)

56% (1994)

45% (1990)

41% (1990)

57% (1989)

62% (1990)

45% (1992)

34% (1991)

42% (1991)

51% (1991)

51% (1984)

55% (1993)

47% (1992)

52% (1990)

48% (1989)

42% (1993)

30% (1993)

54% (1992)

22% (1992)

90% (1990)