52% (2005)

35% (2006)

51% (2004)

41% (2007)

35% (2004)

45% (2005)

40% (2008)

52% (2008)

49% (2005)

35% (2006)

51% (2005)

48% (2005)

30% (2008)

51% (2006)

56% (2004)

40% (2002)

60% (2006)

50% (2005)

30% (2008)

47% (2006)