73% (2003)

72% (2005)

53% (2002)

44% (2005)

57% (2004)

46% (2003)

63% (2005)

52% (2003)

37% (2001)

45% (2002)

30% (1998)

58% (2003)

48% (2004)

0% (1999)

40% (2002)

60% (2002)

20% (2001)

10% (2002)