Year	% of GDP
1972	12.653590016203179
1973	13.161525928554402
1974	11.746681693457695
1975	13.605937138391305
1976	14.230906094896504
1977	13.222456200504261
1978	15.667477914285612
1979	13.33270707990403
1980	18.763405563301646
1981	17.391435951870314
1982	16.43739019868157
1983	18.305018324649932
1984	17.41944388679644
1985	17.03383567266677
1986	16.9362407876685
1987	15.852185123281929
1988	13.212941460655264
1989	12.97759017844944
1990	19.457100948242743
1991	14.569016305109999
1992	17.15501788253295
1993	15.309343831622172
1994	15.4302640521815
1995	17.501808536291293
1996	17.04990929604885
1997	16.625415577289306
1998	16.92433542863469
1999	17.818131509075176
2000	18.421288707748197
2001	18.243985821275757
2002	17.61343290553269
2003	17.770837880560055
2004	17.38337157522978
2005	18.02013367949623
2006	17.077676726243787
2007	18.143400211145476
2008	17.823630589268795
2009	18.483582247006343
2010	17.822339894800738
2011	17.627884921283883
2012	17.917788498232326
2013	18.9583513319003
2014	20.51142191159478
2015	20.567582370092786
2016	19.18802693528984
2017	20.150278468518536
2018	19.88925174910838
2019	20.661911859187725
2020	26.906540274766556
2021	22.844190922955782