Year	current US$
1970	78622289.3516022
1971	101655584.508941
1972	67257788.239613
1973	111670300.634491
1974	132117392.382272
1975	151401095.243575
1976	181557250.323015
1977	199979233.673
1978	250590664.706296
1979	368050333.240157
1980	540345971.065631
1981	548964201.024391
1982	444339850.315982
1983	186191936.806117
1984	167257337.205885
1985	155310480.094513
1986	107938750.577357
1987	54747602.1483211
1988	75232492.8567625
1989	78147585.4095521
1990	115789100.813222
1991	101109004.310169
1992	41312429.4997631
1993	68454143.0213667
1994	34120275.4696435
1995	130488761.315411
1996	107501737.43161
1997	178256571.048188
1998	223452170.919405
1999	387350613.322238
2000	472834431.548739
2001	500857076.953356
2002	419748909.604242
2003	361210983.13863
2004	360908065.59078
2005	393761131.078437
2006	415139010.41357
2007	443629971.831304
2008	607814392.866299
2009	914693201.571824
2010	1218992231.34777
2011	1777202776.55965
2012	2435698664.07017
2013	3003080052.05124
2014	3079293902.21936
2015	3005994502.80194
2016	3527546799.36697
2017	4001964943.31527
2018	4518161787.62091
2019	4206448943.45298
2020	3805679678.34371
2021	4354593637.72189