Gross domestic product decreased by 7 percent on the year in the fourth quarter of 2011, in non-seasonally adjusted terms, the Greek Statistical Authority said.
The struggling eurozone country has been shut out of long-term debt markets since 2010, and is surviving on rescue loans from European Union countries and the International Monetary Fund. But harsh austerity measures demanded in return for the emergency loans have hammered the economy.
Greece's economy has been in decline since late 2008, with successive quarterly contractions since then, with the exception of the first quarter of 2010.
On Tuesday, the Public Debt Management Agency said it had raised (euro) 1.3 billion (USD 1.7 billion) in an auction of 13-week treasury bills at a rate of 4.61 percent down from the 6.64 percent rate from the previous sale of three-month debt on Jan. 17.