Year	% of GDP
1987	0.8281923701270789
1988	0.9417917038228042
1989	0.7565726103469983
1990	0.4039239424859398
1991	0.3844360250346666
1992	0.4244206427196663
1993	0.49038843071045385
1994	0.38104358316307607
1995	0.3932393210878083
1996	0.3926895991930051
1997	0.3680326477309062
1998	0.28940398013707797
1999	0.3527406697262332
2000	0.35452294746800894
2001	0.2950354011534798
2002	0.2528508328461009
2003	0.2680145445128807
2004	0.24519932275836248
2005	0.21288033376122506
2006	0.2152582299610776
2007	0.21550515417953053
2008	0.188486317763506
2009	0.1861097972432013
2010	0.2121232687418384
2011	0.22866056479118918
2012	0.2403818340492616
2013	0.2286310529278042
2014	0.22148912189384862
2015	0.21764249847505515
2016	0.21432817260955306
2017	0.2602089472159601
2018	0.2403260638102402
2019	0.23302718460937014
2020	0.24779293355616164
2021	0.21360353938104873