Year	% of GDP
2000	15.236283270191356
2001	15.780166763737505
2002	16.01742939349759
2003	16.12980487096846
2004	16.841203585648856
2005	14.985664344279567
2006	15.405991966312268
2007	18.7610594305544
2008	20.60346737689508
2009	19.225507401922716
2010	16.440632363433462
2011	17.352874817422325
2012	16.909561241303354
2013	17.539594234604724
2014	17.05020165608162
2015	17.917315682506967
2016	18.133158768987634
2017	17.60492514228951
2018	16.174471990291703
2019	15.978160283997154
2020	16.836152283050442
2021	17.788449698058113