Year	% of GDP
1997	3.27394008636475
1999	3.38131999969482
2001	3.87380003929138
2003	3.57947993278503
2004	3.36128997802734
2005	3.35958003997803
2006	3.47499990463257
2007	3.23382997512817
2008	3.46999001502991
2009	3.39527988433838
2010	3.1678900718689
2011	3.18702006340027
2012	3.23024988174438
2013	3.26042008399963
2014	3.10184001922607
2015	3.21902990341187
2016	3.24735999107361
2017	3.36279010772705
2018	3.32105994224548
2019	3.38757991790771
2020	3.48959994316101
2021	3.41742992401123