Year	% of GDP
1970	0.0912323758377636
1971	0.116086396820703
1972	0.126238901395802
1973	0.12072735958353
1974	0.30652831588701
1975	0.709224768381466
1976	1.00455608302614
1977	1.39196668835784
1978	1.25581933243056
1979	2.59136290095478
1980	2.65950079798497
1981	2.69078482508056
1982	2.14381329803254
1983	2.67918685094599
1984	2.9879793993679
1985	2.96255948861727
1986	1.04488150129258
1987	1.17000819246885
1988	0.693268987825622
1989	0.823953331400412
1990	1.00627920664815
1991	0.510409231122626
1992	0.50275494333773
1993	0.602769101944268
1994	0.612814834476715
1995	0.664257474316672
1996	0.855025559537136
1997	0.635577342150121
1998	0.172024998917896
1999	0.466885422064688
2000	1.05085122197897
2001	0.937004459646389
2002	0.81283767292158
2003	0.762200302418188
2004	0.735707508866846
2005	0.83595827885591
2006	0.913361392253003
2007	0.855441736513527
2008	1.33659576191205
2009	0.84946186314372
2010	0.861239087184779
2011	1.07544716241254
2012	0.866071942237571
2013	0.717358769907282
2014	0.569359660800821
2015	0.337710045585096
2016	0.273025131582337
2017	0.397885220213493
2018	0.626195352812848
2019	0.540491129160741
2020	0.28397504842807
2021	0.588544260440276