Year	% of GDP
1970	2.814161470839574
1971	1.6698899891136896
1972	1.5049111378532711
1973	2.579260068508678
1974	3.0507020999181327
1975	1.1283425105482283
1976	1.339924692689736
1977	1.1835213467031838
1978	0.7059281942219373
1979	3.119490132558767
1980	7.122394456161721
1981	3.800342676197996
1982	2.6635834398359823
1983	3.324732053511627
1984	0.6761915798122592
1985	2.369294162008623
1986	2.0689154386405892
1987	2.3539579104089534
1988	2.919613083595164
1989	2.2397469154294654
1990	1.3812836495404939
1991	1.3883662629880635
1992	1.1628777782663278
1993	1.2273444628114218
1994	1.4810271074647314
1995	0.5489426407951359
1996	0.9141088970308638
1997	0.5751262554462812
1998	0.41650962049702644
1999	0.30616612105625585
2000	0.4829674967939805
2001	0.5101814243923024
2002	0.6114504484335227
2003	0.2325531100213346
2004	0.40907220985696807
2005	0.706906894036022
2006	1.3322273705393617
2007	1.5316390035888892
2008	1.5798231324421097
2009	1.0073611603545611
2010	1.7605414638495267
2011	2.0748005670678613
2012	1.619902968651227
2013	1.5648936413906498
2014	1.1209721499726983
2015	0.5462314239846741
2016	0.7439180204682475
2017	0.9834618380008006
2018	0.8785124477026486
2019	0.9950451511133991
2020	1.2670371742289261
2021	4.2043255778261175