Year	% of GDP
1971	0.1252625193655773
1972	0.12331121062751264
1973	0.12866979723398414
1974	0.3265095873014022
1975	0.9246824503776626
1976	0.9417876417621357
1977	0.9498151898581675
1978	0.8163453398802833
1979	0.7057630743508088
1980	0.9295134886990026
1981	1.4016482092234794
1982	1.6370566062438838
1983	0.9291035421096405
1984	0.729341983667697
1985	0.83823086984608
1986	0.5108690482824476
1987	0.21265488660433526
1988	0.36006852370555353
1989	0.42544383096171334
1990	0.48338297600362107
1991	0.4748369774624481
1992	0.33695099624295843
1993	0.1664147399623687
1994	0.13774258892393573
1995	0.25017109830064677
1996	0.16568210261956712
1997	0.13401020982687492
1998	0.12640681404408938
1999	0.0847788754685984
2000	0.1252735884066544
2001	0.36715358192280423
2002	0.18365745252200297
2003	0.17586346442691556
2004	1.0089701883523765
2005	0.7457452288718931
2006	0.7556418936467847
2007	0.8977767192471832
2008	2.1698371359330744
2009	0.8540711768488956
2010	1.2951798255329412
2011	1.7084479560072454
2012	0.9503520498514897
2013	0.6341843881208215
2014	0.4922989035620269
2015	0.30303211831065474
2016	0.32562667728342815
2017	0.41830330015710837
2018	0.4833919982258631
2019	0.3669314258337169
2020	0.30422743254283613
2021	0.533882720045296