Year	% of GDP
1967	11.893144816499381
1968	11.699331084276364
1969	12.019120661122008
1970	11.34769795637006
1971	11.58905062921847
1972	13.37644051664863
1973	9.660933301235339
1974	13.454838373074557
1975	11.771311102659572
1976	8.957488077052139
1977	10.588390175123283
1978	11.78844562693245
1979	11.418287672290806
1980	0
1981	0
1982	0
1983	0
1984	0
1985	18.442203934736245
1986	18.31403608326744
1987	17.165232366810216
1988	17.66440744705129
1989	17.037602359805838
1990	17.03556042560572
1991	14.256412064723506
1992	15.193204293104696
1993	13.230802066478809
1994	10.797153369545969
1995	9.872768099572088
1996	10.982529944685952
1997	11.20175179247794
1998	18.741911719767167
1999	14.684646793381399
2000	16.41743626954702
2001	14.998356118396508
2002	15.360704396185213
2003	15.566553474009531
2004	15.460917109288433
2005	13.846429400844857
2006	13.262239951527743
2007	13.94575919175422
2008	15.49116054674231
2009	14.555723543023982
2010	15.687645480501855
2011	18.79316366992498
2012	15.484434131566852
2013	16.878050197536602
2014	16.256529691476967
2015	16.37155074609335
2016	16.24060159421746
2017	16.18425041791799
2018	15.877219836204953
2019	15.743109745298922
2020	15.805424254341238
2021	16.248773593888615
2022	17.11924475808959
2023	17.060791644114616