Year	% of GDP
1970	2.0717438575213136
1971	2.2823003129871964
1972	1.860393404621042
1973	2.416868945243426
1974	2.313486931953662
1975	1.9413989890789585
1976	1.1823718575347602
1977	1.588048427780792
1978	1.7049731093042815
1979	2.1762731409162326
1980	2.115634829716346
1981	0.21602215155761118
1982	0.02862287357248057
1983	1.3509843965710098
1984	1.5909640340633289
1985	0.3432026814146417
1986	0.7149416201017295
1987	1.9849056696931846
1988	1.4127762476015562
1989	1.2643683536102046
1990	1.4095037715352818
1991	0.5737242629820788
1992	1.1807519060828302
1993	0.7216016950393173
1994	1.6451628771247246
1995	2.2538730353062073
1996	1.3982819325689722
1997	2.3179697345197257
1998	3.9399382173761675
1999	4.047103639647167
2000	9.171024286715111
2001	3.841921292924778
2002	3.219147678071452
2003	0.7829675554532156
2004	0.14146589604803417
2005	2.178163809175939
2006	4.874101289551048
2007	8.200559048862143
2008	4.5151371416977035
2009	1.5241311807692715
2010	1.8372563874088144
2011	2.1378331076083494
2012	2.700169008956752
2013	3.6298039835700577
2014	3.553903370110022
2015	3.853894537061533
2016	2.238350121409034
2017	1.5375207195393437
2018	2.4693120725486337
2019	2.806766870176532
2020	1.758970856685765
2021	2.9452514885533776
2022	2.3125165258733733