Year	% of GDP
2008	16.356765378989323
2009	15.420824529486628
2010	16.598119299288932
2011	17.45090662239222
2012	18.06918107375159
2013	18.478683310238143
2014	19.134721132700392
2015	19.690331099403767
2016	19.355969869504477
2017	19.469252842951683
2018	20.982240199597776
2019	18.374108141505303
2020	17.92945651236608