Year	% of GDP
2000	3.589362691254098
2001	3.8475299254701056
2002	4.0612023580167875
2003	4.191995169669515
2004	4.309834019283652
2005	4.349765477640503
2006	4.479165713959511
2007	4.49296498747287
2008	4.363019673313034
2009	4.585534972419514
2010	4.359399513605958
2011	4.259033585055897
2012	4.283044174306719
2013	4.474082535286981
2014	4.420560960116428
2015	4.445911718498934
2016	4.2630218245200675
2017	4.1322454230185235
2018	4.0230865931916915
2019	4.056356207820972
2020	4.1327143249342
2021	4.227221924409788