Year	% of GDP
1997	16.079617453235848
1998	15.801075093173278
1999	15.561009771324297
2000	15.240097690814828
2001	14.053573200067401
2002	13.595637896293583
2003	13.409986525162616
2004	13.257019315390389
2005	13.011553059139086
2006	12.950334722630744
2007	12.684881579060914
2008	12.059197037579882
2009	11.552273703606355
2010	11.719419236896512
2011	11.737867897650096
2012	11.667872327872638
2013	11.552807202229951
2014	11.41001175101211
2015	11.474090167821696
2016	11.062054821549442
2017	11.061813303633455
2018	11.16778774935829
2019	10.85620330149666
2020	10.388375855653232
2021	10.4013836402699