Year	current US$
1970	57377295.1969337
1971	62624524.5498851
1972	67829943.2729264
1973	97782436.6164349
1974	116927562.275206
1975	113810970.613154
1976	119041524.92399
1977	125669843.037232
1978	155773195.707401
1979	176925912.125771
1980	203884484.48918
1981	216370184.558464
1982	184272735.574952
1983	190484825.237795
1984	194590988.611105
1985	201609565.10019
1986	222519820.751125
1987	260619404.849677
1988	302925138.799476
1989	305582950.493829
1990	289765506.351129
1991	354291264.742796
1992	387729664.692982
1993	436534459.01418
1994	489788818.230184
1995	423567067.797365
1996	426258579.080072
1997	361409691.509419
1998	258583059.897342
1999	198344634.096277
2000	197156676.826906
2001	189077094.010431
2002	188783242.01783
2003	219211329.938601
2004	241854849.096319
2005	282611007.09483
2006	487061397.321373
2007	557473807.883418
2008	701109236.273922
2009	735417714.361278
2010	1013961504.45515
2011	1276623059.6223
2012	1536173984.52268
2013	1520037990.98535
2014	1614775915.57826
2015	1518400294.62651
2016	1452481701.23698
2017	1553975937.29887
2018	1625175761.08476
2019	1672069452.04731
2020	1721242657.12732
2021	1914755411.66613