Economy of Greece:

Between 2005 and 2011, Greece has had the highest percentage increase in industrial output compared to 2005 levels out of all European Union members, with an increase of 6%. Eurostat statistics show that the industrial sector was hit by the Greek financial crisis throughout 2009 and 2010, with domestic output decreasing by 5.8% and industrial production in general by 13.4%. Currently, Greece is ranked third in the European Union in the production of marble (over 920,000 tons), after Italy and Spain.

Please answer a question about this article. If the question is unanswerable, say "unanswerable". What did the industrial production in Greece fall by due to the financial crisis?
13.4%.