Year	current US$
1970	6803935.68514518
1971	8092396.53512992
1972	9321521.62584678
1973	9735956.65811235
1974	43358425.0144758
1975	57644460.9148813
1976	75052692.5303997
1977	82612632.3103648
1978	84067177.7649104
1979	114696004.63231
1980	183198619.571511
1981	224657797.336421
1982	236859302.83729
1983	247976847.712797
1984	275390869.716271
1985	309753320.208454
1986	232083778.010471
1987	239373203.90117
1988	250217165.149545
1989	264537321.196359
1990	307258314.694409
1991	312477873.602082
1992	349614624.96749
1993	387424441.092326
1994	399981207.802339
1995	428993531.339402
1996	458539632.249675
1997	535524586.475942
1998	539798564.369312
1999	576010860.190724
2000	693279381.621151
2001	663796626.63199
2002	755607943.250975
2003	793087245.9818
2004	872574731.027307
2005	979952252.483747
2006	1454689202.96489
2007	1736585127.0741
2008	2577807095.36194
2009	2118673035.83875
2010	2847978150.96046
2011	3384364411.2441
2012	3805370497.63375
2013	3959418274.37467
2014	4177129806.23115
2015	3732472994.6425
2016	3682526313.83931
2017	5047659922.64948
2018	5621109399.85856
2019	5338136010.38003
2020	4592050696.84149
2021	5340740883.00086