36% (1994)

51% (1997)

40% (1995)

43% (1994)

55% (1995)

50% (1996)

60% (1999)

44% (2000)

32% (1992)

48% (1995)

23% (1996)

47% (1995)

38% (1994)

49% (1995)

40% (1996)

36% (1995)

40% (1996)

46% (1993)

44% (1997)

35% (1996)