Year	% of GDP
2004	14.59633832573512
2010	15.635200884660463
2011	13.937908243048538
2012	13.83933585306817
2013	12.690435415529219
2014	13.582991522702725
2015	13.989798454111261
2016	14.22711073672932
2017	16.85380844821685
2018	20.165791696052395
2019	21.701865275392247
2020	20.16478293012935
2021	19.441882187339925