File photo of the Belgian headquarters of oil giant ExxonMobil in Machelen

The Belgian headquarters of oil giant Exxon Mobil is pictured in Machelen, northern Brussels, in this October 27, 2012, file photo. Exxon Mobil Corp announced quarterly dividend to 63 cents per share from 57 cents per share. REUTERS/Sebastien Pirlet/Files (BELGIUM – Tags: BUSINESS ENERGY)