Year	% of GDP
2006	14.406825294559535
2007	16.262919190977946
2008	15.733753560421645
2009	31.599247398398994
2010	25.55566305633356
2011	22.51885131222136
2012	28.06583304286659
2013	22.666834924262407
2014	21.75833206651734
2015	21.125981389563872