Greece's economy continues to contract. It shrank 5.6 percent between January and March from the same period last year.
It was the 19th straight quarter of decline and followed a 5.7 percent slump in the fourth quarter of 2012.
Greece is stuck in a spiral of falling consumption and investment.
Athens has blamed the austerity measures forced on it by the European Union and the International Monetary Fund in return for a bailout to stop the country going bankrupt.
A war of words has now broken out between Brussels and the IMF over that rescue.