Year	% of GDP
2008	15.7349559857926
2009	18.9891511041539
2010	22.9155732571907
2011	29.1291103308087
2012	28.8414501106727
2013	31.0754690792497
2014	31.2948232688486
2015	34.3661484918675
2016	31.8934580275991
2017	31.4535990866679