Year	% of GDP
1970	26.00609747435308
1971	23.83427163121636
1972	22.935375958543368
1973	26.358986672724626
1974	29.771023272588575
1975	23.777389978080084
1976	26.597776712695094
1977	24.44195693820012
1978	23.887763741551773
1979	24.421323262545503
1980	26.767689668447307
1981	24.693334377998777
1982	23.73429134814745
1983	22.248251205005644
1984	23.311732457446464
1985	23.170876208839072
1986	21.748083897260415
1987	22.128433350026196
1988	22.57904822602051
1989	22.328807918408316
1990	22.558627741145877
1991	22.19905449843655
1992	21.567775900689025
1993	19.072480288042783
1994	19.00764429383234
1995	20.042343827916042
1996	19.355080211960786
1997	19.50169601100299
1998	19.734486209451745
1999	20.2331192754624
2000	20.864575792970015
2001	20.8433578440544
2002	21.57123348714828
2003	21.179374790097206
2004	21.262443030766658
2005	21.16937113095814
2006	21.95761566337783
2007	22.246045706824912
2008	21.778514420900443
2009	19.508755681307008
2010	20.579795161534367
2011	20.4680887248433
2012	17.789512870525456
2013	16.89239376213803
2014	16.959201811767148
2015	17.10726702127338
2016	17.56102830851142
2017	18.054071167403205
2018	18.52746022448345
2019	18.23967793366371
2020	17.70074374572533
2021	21.737481685676315
2022	23.089118870162903
2023	20.917071246062342