According to data from the IMF (International Monetary Fund), in 2008 the Greek economy was the twenty-seventh largest in the world by GDP (gross domestic product).
(It had the 22nd highest standard of living in the world. The public sector accounted for about 40% of GDP. The service sector contributed 75.8% of the total GDP, industry 20.8% and agriculture 3.4%. It was the twenty-fourth most globalized country in the world and classified as a high income economy. I'm not sure what the IMF rates it now.)