In 2011, the Thessaloniki (regional unit) had a Gross Domestic Product of Euro18.293 billion (ranked 2nd amongst the countrys regional units), comparable to Bahrain or Cyprus, and a per capita of €15,900 (ranked 16th). In Purchasing Power Parity, the same indicators are €19,851 billion (2nd) and €17,200 (15th) respectively. In terms of comparison with the European Union average, Thessalonikis GDP per capita indicator stands at 63% the EU average and 69% in Purchasing Power Parity – this is comparable to the German state of Brandenburg. Overall, Thessaloniki accounts for 8.9% of the total economy of Greece. Between 1995 and 2008 Thessalonikis GDP saw an average growth rate of 4.1% per annum (ranging from +14.5% in 1996 to −11.1% in 2005) while in 2011 the economy contracted by −7.8%.
Question: How many years did Thessalonikis see a GDP average growth rate of 4.1% per annum?
Answer: 13