Year	% of GDP
2000	4.300249725536598
2001	4.293997556307259
2002	4.231826036337738
2003	4.2697160047995935
2004	4.270018312920015
2005	4.224829662577148
2006	4.010448536313159
2007	3.887622151724384
2008	4.005711723622425
2009	4.412208457214905
2010	4.3378380004298345
2011	4.7306765348041155
2012	4.761484989895505
2013	4.481408525096221
2014	4.476092710512326
2015	4.461462656249578
2016	4.490765710174112
2017	4.391687812311736
2018	4.35664834645325
2019	4.466237115606941
2020	4.59253824069274
2021	4.4007339307625335