38% (2004)

51% (1997)

39% (1998)

31% (2003)

30% (2000)

18% (1996)

23% (1998)

42% (1995)

40% (1996)

32% (1996)

40% (1998)

40% (1998)

46% (1997)

48% (1997)

33% (1998)

50% (1999)

79% (1997)

53% (1998)

20% (1999)

53% (1997)