Year	% of GDP
1970	2.0223381467511383
1971	1.7619238041995064
1972	1.9814804678598663
1973	3.0158557201635614
1974	6.92962194405575
1975	6.168563147915445
1976	6.226657750103943
1977	7.6408280376062265
1978	6.206552505064519
1979	11.043322846146404
1980	8.750292046883192
1981	5.157541989128218
1982	4.490524832074756
1983	5.091850141289969
1984	5.462384383094957
1985	5.527500101994659
1986	3.4107625858455455
1987	3.9766955033364013
1988	3.8754363989399705
1989	5.527621901127057
1990	6.4494029721112165
1991	5.108680510803571
1992	5.015392778761229
1993	6.105832875546191
1994	5.409870465289648
1995	6.388885875708604
1996	6.655806194896854
1997	5.9008134024110825
1998	4.055275308614283
1999	3.1773706886754054
2000	5.025833964551488
2001	4.364498453241706
2002	4.2822384110498755
2003	4.518446347220485
2004	5.438247382307151
2005	6.751855408370348
2006	7.24647046528065
2007	7.420544947724508
2008	9.846486160477298
2009	5.47973449622933
2010	6.722044550791157
2011	8.21403361742108
2012	7.038151647938467
2013	5.978955063407653
2014	4.868804240674424
2015	2.871277911875946
2016	2.6368299175479044
2017	3.316083766457859
2018	3.764575167614287
2019	3.1765186599371624
2020	2.415493524318868
2021	4.131704087184842