LJUBLJANA, March 25 (Reuters) - Slovenia's largest fuel retailer Petrol PETG.LJ has raised 50 million euros ($68.9 million) from a six-month bond offering a yield of 2.75 percent, the company said on Tuesday. The yield was down from the 3.4 percent on its previous issue in September, indicating improving investor demand in a country that narrowly avoided an international bailout last year. "Demand was significanly higher than the size of the issue," Petrol said in a statement without giving further details, adding that the money is to be used to cover short-term financial obligations. Petrol operates 476 filling stations in Slovenia, Croatia, Bosnia, Serbia, Montenegro and Kosovo. ($1 = 0.7255 Euros) (Reporting By Marja Novak; Editing by David Goodman) ((Marja.Novak@thomsonreuters.com)(+386-8-2056369)(Reuters Messaging: marja.novak.thomsonreuters.com@reuters.net)) Keywords: PETROL LJUBLJANA BONDS/