Year	% of GDP
1970	0.8805583954048353
1971	0.8672954080678228
1972	0.9484942180201676
1973	1.519553869386328
1974	2.676804011574912
1975	3.08988712253473
1976	3.366383625129458
1977	3.3344839757740345
1978	2.601345642645308
1979	4.346113652923127
1980	4.864004668294858
1981	3.9356120952660616
1982	3.502562691634346
1983	3.0841389225136213
1984	2.7148397690614434
1985	2.7202990901302853
1986	1.3922252145093985
1987	1.364714915630873
1988	1.2543456991203583
1989	1.4379240121271406
1990	1.6500683710726776
1991	1.130843319939728
1992	1.0696962924040938
1993	0.8865419269438962
1994	0.7705994436138117
1995	0.823190486626511
1996	0.9261354767089289
1997	0.8663644597872859
1998	0.7289176798218232
1999	0.728815359331788
2000	1.0826405730106146
2001	1.104904936735211
2002	0.9940779323296705
2003	1.0752689426173556
2004	1.8010319353070197
2005	2.2001418019442474
2006	2.6224356873401917
2007	3.2385326076077354
2008	4.846176608692612
2009	2.325391461125668
2010	3.6101105409799445
2011	4.5114689356865245
2012	2.742242675791475
2013	2.360412868547852
2014	2.0185078373115384
2015	1.1912226093920901
2016	1.078551124874619
2017	1.3534710903150338
2018	1.5022127773398322
2019	1.3800326592136372
2020	1.0772889927238274
2021	2.1714015228169967