mert obigations fa the years ended December 31, 2014 and 2013 Is as follows (ti thOutandt) As of December 31. 2014 2013 Balance at ire begnnng of Ire year C2.5,73 Cre2 Adamant.' odgation 2,930 1.733 Accretion expense 243 113 Effect of exchange rate charges on asset retirement clolgatore (677)