20% (1996)

51% (1997)

48% (1995)

46% (1993)

48% (1996)

42% (1997)

55% (1995)

43% (2000)

49% (1995)

33% (1994)

57% (1999)

34% (1994)

39% (1995)

53% (1995)

40% (1996)

35% (1996)

39% (1995)

32% (1992)

35% (1994)

50% (1994)