Year	% of GDP
1970	0.0156688439786595
1971	0.0551276822693913
1972	0.0644778111666937
1973	0.0966253001839665
1974	0.401813017550154
1975	0.280814902169639
1976	0.220074807046092
1977	0.21249292669636
1978	0.196069037564345
1979	0.362416289836324
1980	0.488531548581327
1981	0.386417918520162
1982	0.262706910889372
1983	0.337848850557612
1984	0.5013354684148884
1985	0.4420728163789248
1986	0.1730620607384425
1987	0.9327519620852043
1988	0.5885834952544389
1989	0.8131819142911503
1990	2.4729232713253735
1991	1.184885234540736
1992	0.9666937547743253
1993	1.0274582448564955
1994	1.0821346669845926
1995	1.043403997504395
1996	1.373693528761291
1997	1.0532029093305484
1998	0.2778573743222188
1999	1.0099295244284296
2000	2.3080732215421467
2001	2.120361491960182
2002	2.0795573070179567
2003	2.047187055558814
2004	2.329334079298758
2005	2.983721278375876
2006	3.2897003902870434
2007	3.241879810297628
2008	4.225617726255299
2009	2.932437175300312
2010	2.9002691156720886
2011	4.08237955267446
2012	3.6689715046987317
2013	3.20872134831161
2014	3.066154325940466
2015	1.4823370816775012
2016	1.1687435483782855
2017	1.8247944672613303
2018	3.0821030215623333
2019	2.64960143431386
2020	1.3289774547117492
2021	2.7413930986801827