45% (1990)

69% (1990)

56% (1994)

42% (1990)

56% (1989)

63% (1990)

42% (1993)

52% (1990)

42% (1991)

60% (1993)

39% (1991)

53% (1984)

51% (1991)

52% (1992)

30% (1993)

47% (1992)

48% (1989)

40% (1992)

55% (1993)

22% (1992)