Year	% of GDP
2000	3.923167701921437
2001	4.25958855088376
2002	4.459418877978554
2003	4.64510903587915
2004	4.763454627451729
2005	4.819069225447939
2006	4.974671926079039
2007	5.00450917392955
2008	4.831298996299064
2009	5.181520940113235
2010	5.0267288210103365
2011	5.007412852954087
2012	4.866948152361326
2013	4.954937721631395
2014	4.8848207979951805
2015	4.986507420365729
2016	4.92565160461485
2017	4.7966692114833664
2018	4.648387283172066
2019	4.742641531727027
2020	4.929467679185986
2021	4.934533504735285