Year	% of GDP
1970	5.258671256583469
1971	4.766588075240604
1972	4.050698962310141
1973	3.4523762092661583
1974	4.284014961599694
1975	3.614617245667147
1976	3.0208053525285896
1977	3.020316308206576
1978	2.73776120437836
1979	2.3237520884782628
1980	24.710540339659296
1981	18.640014861897566
1982	12.081028246922324
1983	12.502424804325964
1984	13.597591916524408
1985	12.050285048613892
1986	8.037123304812752
1987	8.70270004018793
1988	6.771460215570654
1989	8.783313302803997
1990	9.823011453835587
1991	6.419697474794272
1992	6.474713820966165
1993	6.533338325797283
1994	5.799184056445428
1995	5.322230910733571
1996	6.057924636177258
1997	5.488742725573042
1998	3.5419119294848547
1999	4.401145920251841
2000	6.504213735057477
2001	5.376469091053396
2002	4.841655289742296
2003	4.822688651069266
2004	5.3652198938581295
2005	6.583147208855395
2006	7.205121935374011
2007	6.481390795117727
2008	7.660570201961911
2009	5.325985976279141
2010	6.941586398709589
2011	9.008360348205702
2012	8.253552789487031
2013	7.5037250346067905
2014	6.688195233238201
2015	4.849781651634743
2016	3.9871355411509573
2017	4.367963822591695
2018	5.006875321108888
2019	4.559764098622077
2020	3.8323233496493403
2021	6.325160350668556