Year	% of GDP
1970	2.209122481301181
1971	2.023326695490975
1972	2.8899506250617457
1973	5.057216870178778
1974	19.420272365011822
1975	13.900589627756677
1976	12.968767921951322
1977	15.779262531652384
1978	12.98696863083742
1979	28.360105889736715
1980	17.5668206151616
1981	4.5550435285871576
1982	2.9162543498666054
1983	5.19923562049247
1984	7.080921235132256
1985	8.08991423016134
1986	4.841731077330255
1987	7.442893712719501
1988	6.84757325869773
1989	11.969328040739358
1990	13.793667506116567
1991	9.860553282044437
1992	10.618470212683361
1993	15.331292128029467
1994	13.585778200761919
1995	14.680156137454333
1996	15.134294086761685
1997	13.544695526821986
1998	8.45167335448566
1999	6.584161738113933
2000	11.230451979470036
2001	9.389568783917955
2002	8.360755133542668
2003	9.022937895085919
2004	9.921217667112055
2005	12.007086084349108
2006	11.824406717910358
2007	11.152899512732018
2008	13.073388098426074
2009	8.091805569769878
2010	10.408342358604319
2011	12.900757313017085
2012	11.171293607774507
2013	8.891978201815677
2014	7.066374576094755
2015	4.117292423518528
2016	3.9014120503978367
2017	5.593864904865299
2018	6.847147496375239
2019	6.046471118206649
2020	4.147533014298583
2021	6.990693489820327