Year	% of GDP
1970	17.8700023254966
1971	17.8624590248963
1972	18.7417647729893
1973	14.6266811217403
1974	28.4605828237216
1975	16.5693044361395
1976	17.3169540746777
1977	18.1790813533758
1978	16.2920776303593
1979	14.2431744831896
1980	14.3988413188888
1981	12.2470769944789
1982	11.0450255529325
1983	9.59453938438348
1984	11.1148200276506
1985	12.0743392070621
1986	10.1999614112829
1987	5.66291354582063
1988	6.26983668102382
1989	17.9456663503837
1990	24.9251550632949
1991	19.9460123835592
1992	22.8639354771962
1993	16.3479624727372
1994	13.5676097350674
1995	9.7655832957579
1996	10.6504016452728
1997	8.94786757802082
1998	4.90955761131605
1999	7.92111939836538
2000	12.3387388089747
2001	11.6233257963328
2002	7.86803705064934
2003	6.93494800304082
2004	8.9413724509072
2005	15.2004474166859
2006	13.1868444010477
2007	14.3924082867818
2008	15.9675361939534
2009	11.3987131377577
2010	22.1694362010361
2011	31.9335594131783
2012	29.1297720421828
2013	20.7444083074763
2014	13.3454910423686
2015	5.12495877980327
2016	15.0617975898749
2017	19.7854729048857
2018	8.44388268533074
2019	6.83251753458721
2020	4.60122863820656
2021	9.59272209392741