Year	% of GDP
2000	21.2688185412257
2001	25.5518299388015
2002	19.0483098556608
2003	21.1154593261641
2004	18.144600025938
2005	19.2348527414667
2006	20.1423286435272
2007	19.4014629977546
2008	19.7979080468874
2009	17.417327888289
2010	20.180669633752
2011	19.9884262830526
2012	19.6525193632521
2013	25.2065703247776
2014	24.6846344829828
2015	23.9709714234274
2016	22.9107837105821
2017	21.5893352753923