Year	current US$
1970	346241217.616301
1971	417535774.076351
1972	672281841.346156
1973	648732680.850932
1974	592958155.195683
1975	271505749.816701
1976	414387936.074415
1977	562583382.234052
1978	511532936.105496
1979	760621411.232215
1980	1236699634.35898
1981	1718411658.26666
1982	1334071097.75486
1983	930424810.12819
1984	844693386.287573
1985	687266308.302873
1986	678133840.999328
1987	656110113.500752
1988	721875315.489165
1989	697353029.490543
1990	752508735.640538
1991	860999530.370539
1992	1101094233.43124
1993	1189783566.69223
1994	1415868503.16721
1995	1837122590.27447
1996	2129922981.50338
1997	2576633811.69755
1998	2750971194.81649
1999	2666208202.34799
2000	2575012578.87294
2001	2452038042.55095
2002	2487352874.77179
2003	2680060674.98843
2004	3203049331.14362
2005	3785239665.51084
2006	4465617891.47233
2007	5275775990.14968
2008	6624815152.35758
2009	6754122678.47423
2010	8588858961.24387
2011	9449083698.76322
2012	11768535116.875
2013	12105714506.5183
2014	11764298574.2868
2015	11641165727.0719
2016	12353298808.8908
2017	14005406539.2464
2018	14150056540.2504
2019	14825699203.1222
2020	13094109974.4347
2021	16511373520.1087