Year	% of GDP
1970	3.1301393807038638
1971	2.5883785266919714
1972	2.5820277411704184
1973	3.6372302591072008
1974	3.203397759019469
1975	3.4966470643654484
1976	2.9224489354284824
1977	4.689089230686961
1978	4.356211233839794
1979	3.9043061431269903
1980	4.262927590298236
1981	4.83161657710184
1982	6.855534896362662
1983	4.483930446670075
1984	4.062338568031699
1985	3.1958790587807857
1986	4.868542890539585
1987	4.462361707552748
1988	4.647662181244628
1989	4.502179120243863
1990	3.9205350701276576
1991	3.6234982689665016
1992	6.362636414465324
1993	5.069392250199027
1994	6.551270223221841
1995	10.659336732555133
1996	11.097179252372486
1997	9.892468626410297
1998	10.377266970844909
1999	6.561592134731487
2000	5.349968170231322
2001	5.5250426357835565
2002	5.977601738133896
2003	8.588733727312675
2004	6.473035628015111
2005	5.74070135596822
2006	5.008576037890967
2007	5.983784654877682
2008	5.759951026777176
2009	5.832375043676614
2010	4.739381672919658
2011	5.2369936781525
2012	6.389155805015174
2013	6.687374923538736
2014	6.9283945542689445
2015	7.3828113783339875
2016	8.37453979343157
2017	7.820337555371675
2018	5.432114735032087
2019	5.207135772464113
2020	5.760865165702527
2021	5.894134587889237