You can find Greek statistics at www.statistics.gr. It's the official site of the Hellenic (i.e. Greek) Statistical Authority. Everything is in English, too. You can subscribe for free and have access to data and series. Also, you can access statistics of the Bank of Greece (www.bankofgreece.gr), where everything is in English, too.

"Eurozone leaders have turned a €50bn Greek solvency problem into a €1,000bn existential crisis for the European Union." David Miliband