35% (1999)

69% (2000)

43% (2004)

60% (1998)

18% (2005)

29% (2008)

70% (1998)

10% (2004)

47% (1998)

56% (1998)

40% (2004)

50% (2005)

55% (2007)

38% (1998)

39% (2002)

37% (2002)

39% (2002)

40% (2006)

40% (2011)

51% (2005)