Year	% of GDP
2003	26.984265461909956
2004	25.79474524604442
2005	28.10381315761225
2006	26.897272770805298
2007	29.246175069487784
2008	30.86364363479171
2009	33.979011776100776
2010	34.31633586269566
2011	32.23864313086327
2012	35.42009998685613
2013	35.39371955319801
2014	33.34169643096756
2015	35.11520259950805
2016	33.69759884696422