65% (1990)

60% (1995)

56% (1991)

44% (1994)

66% (1990)

54% (1992)

40% (1994)

60% (1992)

58% (1993)

33% (1995)

35% (1996)

43% (1995)

49% (1998)

59% (1995)

34% (1996)

32% (1999)

53% (1996)

59% (1959)

41% (1993)

38% (1994)