66% (1991)

45% (1995)

25% (1995)

54% (1991)

57% (1991)

70% (1996)

49% (1990)

60% (1994)

30% (1990)

20% (1995)

47% (1993)

49% (1992)

46% (1995)

35% (1994)

51% (1993)

40% (1995)

67% (1993)

51% (1991)

32% (1996)

60% (1990)