Year	current US$
1970	228759373.631847
1971	245619468.206817
1972	287995620.418281
1973	366151540.426936
1974	413521620.534832
1975	588803074.195652
1976	637644023.389194
1977	777029558.746882
1978	924262140.501472
1979	1101593490.78431
1980	1684812781.62578
1981	1467466808.76956
1982	1443425359.97672
1983	1365077100.47757
1984	1239900708.48135
1985	1344029402.92915
1986	1667892995.07577
1987	1957939763.587
1988	2310094184.81509
1989	2387777648.08636
1990	2698840519.40582
1991	2770245544.18482
1992	2996021728.7171
1993	2821712212.06784
1994	3033560865.7783
1995	3693151254.53642
1996	3951123954.74248
1997	3670026424.23256
1998	3862499097.82799
1999	3896182469.04879
2000	3580967241.99679
2001	3626802825.17262
2002	3919873600.65293
2003	4870684873.6058
2004	5685815538.52797
2005	5640101477.57889
2006	6097278538.17407
2007	7150957163.99888
2008	8086260000.42517
2009	8345631422.68616
2010	8753283574.71278
2011	9316374731.9561
2012	8917449270.14946
2013	9592552292.64767
2014	11037331664.7899
2015	10420607270.7827
2016	10547816886.32
2017	11033289538.2703
2018	11788324038.9378
2019	11993999010.6536
2020	12064082773.2534
2021	14211383612.4466