56% (2003)

40% (1997)

35% (2001)

56% (2000)

23% (1995)

34% (2001)

30% (2000)

48% (2004)

20% (1998)

55% (2000)

35% (2000)

70% (2003)

30% (2000)

42% (1997)

29% (1996)