52% (1993)

58% (1994)

57% (1991)

54% (1994)

42% (1993)

37% (1990)

43% (1991)

51% (1995)

48% (1992)

40% (1995)

42% (1995)

48% (1992)

38% (1993)

46% (1992)

30% (1994)

31% (1992)

45% (1995)

45% (1993)

40% (1992)

40% (1993)