Year	% of GDP
1994	25.559167333867094
1995	17.954072546630425
1996	9.850457439800921
1997	10.693809961054997
1998	12.679334999709353
1999	12.733458716325396
2008	16.421175368486093
2009	14.106708986980884
2010	12.157776992817615
2011	12.224760953880418
2012	12.778639368548344
2013	13.38833316145887
2014	14.21253564826033
2015	15.603162927546894
2016	14.55551657255582
2017	13.164045506114777
2018	12.971271787444438
2019	14.218852645177677
2020	15.185572507409258
2021	13.421320298015518