, ,
, 2004 , , 4%. 2008 - 9%, 2010 - 15%, 2012 - 31%. , , , . 2004 78% , 2008 - 57%.
, , 32% 18%. , . 2004, 2008, 2010 . . 2012 18%, - .
, , , , 38%. , - 34%. .