20% (1998)

30% (2000)

38% (1996)

42% (1999)

38% (2004)

48% (1997)

49% (1997)

51% (1997)

39% (1996)

36% (1995)

46% (1995)

32% (1996)

29% (2003)

46% (1998)

46% (1997)

53% (1998)

42% (1998)

38% (1996)

17% (1996)

40% (1998)