2013 . USD 1,627 ., 2014 . USD 1,373 . stand by , , .
, , . , (USD 1,83 . - 2012 .). 50% , .
, , . , .
Bloomberg, 23 2012 . 3 2015 . 8,884% () 8,166% (), 26 2018 . 8,883% () 8,613% ().