50% (1993)

42% (1993)

57% (1994)

54% (1994)

36% (1993)

43% (1991)

46% (1992)

41% (1995)

48% (1992)

37% (1990)

57% (1991)

51% (1995)

40% (1995)

45% (1995)

40% (1993)

31% (1992)

45% (1993)

41% (1994)

36% (1989)

30% (1994)