Year	% of GDP
1999	4.075950026512145
2000	4.00768506526947
2001	4.07168006896973
2002	3.86491990089417
2003	4.25684976577759
2004	4.05511999130249
2005	4.038749933242794
2006	4.12821006774902
2007	4.1464250087738055
2008	3.95851993560791
2009	4.57174015045166
2010	3.9745060205459604
2011	4.2383599281311
2012	4.37038993835449
2013	4.520430088043215
2014	4.722304821014401
2015	4.4286949634552
2016	4.36299991607666
2017	4.251499891281125
2018	4.064499974250795
2019	3.98000001907349
2020	4.3992199897766096
2021	3.74699997901917
2022	3.729944944381715