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	7413849864.006049
1991	11924609821.796423
1992	7956179977.416995
1993	6072800102.2338915
1994	6674970039.367677
1995	6589520187.377929
1996	6784630010.604866
1997	4469769970.4170265
1998	5079480079.650884
1999	5579319993.97278
2000	6023389898.300177
2001	5112870071.411137
2002	4887719891.548163
2003	4948890007.019045
2004	5238230003.3569355
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	3408680011.2724285