Year	% of GDP
1975	16.24996946612976
1976	18.077838947002352
1977	21.07712076545528
1978	25.97888685048517
1979	28.599979939325916
1980	27.376491571537443
1981	23.072616285901656
1982	21.478549546802526
1983	20.937951778325644
1984	19.484651431117612
1985	22.15039970028938
1986	26.354285802201204
1987	28.646284633728385
1988	28.893463980430163
1989	29.27369464641682
1990	28.00318686767762
1991	25.239750342777977
1992	25.29432664618037
1993	22.768146972822866
1994	21.655323638357928
1995	24.634302879129233
1996	21.49015264369693
1997	21.627857263511167
1998	22.156802147133337
1999	20.29442779156735
2000	17.94589936084997
2001	18.12189279830249
2002	17.36376480709236
2003	16.413428828860503
2004	15.53109710264146
2005	13.693737976772297
2006	12.782193783984658
2007	13.43253807684568
2008	11.42500298560166
2009	11.01889865264678
2010	10.61495058809097
2011	13.331253298715406
2012	13.790994245321246
2013	15.618796573275906
2014	14.96576633375517
2015	15.644796258525048
2016	16.325906100033272
2017	18.021004316724344
2018	18.33232283552987
2019	18.392278426654553
2020	17.69144005481867
2021	19.489779003212824
2022	19.054661597175144
2023	20.517837148134983