Year	constant 2021 US$
1970	4462390007.019044
1971	4384670013.427734
1972	4437249992.370605
1973	3435639919.281007
1974	2320110054.016116
1975	3777779945.3735366
1976	4037320106.506353
1977	4081990039.82544
1978	4048900094.9859667
1979	5523680099.487303
1980	5203660005.569462
1981	4933469888.210297
1982	4382660089.492796
1983	4951379909.515381
1984	4143769912.7197313
1985	5838779931.545259
1986	5651009927.749639
1987	4023290154.457093
1988	3620109973.19222
1989	3329050109.8632817
1990	5245569904.327399
1991	6286439773.559575
1992	5006169990.539552
1993	3895620075.225832
1994	3157319965.3625503
1995	1838629989.6240225
1996	4469860044.479375
1997	549460018.6347967
1998	538440010.0708014
1999	669350000.3814698
2000	965529996.8719482
2001	1358540023.8037114
2002	1393619969.3679817
2003	1627680046.0815425
2004	1285409980.7739263
2005	1731109989.1662602
2006	2262140090.9423847
2007	1897119979.858399
2008	2423959991.455087
2009	2805239990.23438
2010	2403220001.220704
2011	5230829933.166509
2012	4421709905.624395
2013	4203540119.171148
2014	5495840099.334723
2015	4334760128.021243
2016	6324049934.38721
2017	5207110084.533696
2018	3631580024.719246
2019	2199640029.9072266
2020	3409140029.90723
2021	3407410011.291502