, , , .
60% 50% 30 , 26% , - , - .
, (33%), (30%) (28%) , (27%) (27%) .
( 12% ), (17%), (17%) (18%) - (19%).
, , : 2005 23% , 2012 - 25,3%, 26%.
15-20 . , (), ( ) ( ) . 18 25 - , 25 30 , 30 .
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