You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Economy_of_Greece

Context:
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.

Question:
What did Greece have the highest percentage increase in between 2005 and 2011?

industrial output