Year	% of GDP
1970	1.8243996092664225
1971	1.8122032902448515
1972	2.4417276438903093
1973	4.322653216280344
1974	7.857489440066175
1975	9.009928281108834
1976	10.606821712863372
1977	11.167447457296545
1978	11.53076686742656
1979	19.194810833473163
1980	19.662685136098872
1981	16.441220932760285
1982	13.468359088788898
1983	12.16378508246413
1984	10.3523053614341
1985	9.726468661029594
1986	6.418866326095898
1987	7.634418867403337
1988	7.094103456161913
1989	8.229215138574006
1990	9.270264863064904
1991	6.525091341388257
1992	6.124338367968534
1993	5.198123655027348
1994	4.218911502314069
1995	4.188646962910445
1996	3.959156603249893
1997	3.3603005841925047
1998	2.685770094615974
1999	2.803057235706994
2000	4.092643647823688
2001	3.6126932794525093
2002	2.9600973895401914
2003	3.2157186159303652
2004	5.40842041866886
2005	5.9296164544758065
2006	6.183065889957023
2007	6.760717378208648
2008	9.505098416834247
2009	4.296647534004567
2010	6.311155229742172
2011	7.636705644723306
2012	4.409705558598931
2013	3.3712935745967436
2014	2.7807443349771335
2015	1.5407949052541372
2016	1.3584833014179523
2017	1.6545779404135936
2018	1.832484707607379
2019	1.5786027959220592
2020	1.1044677125449092
2021	2.107450203890794