Year	current USD
1968	6891062.97072754
1969	6988120.195667369
1970	8346921.34482491
1971	8443978.56976473
1972	10967466.4182002
1973	10433752.9481418
1974	14995341.2532029
1975	18537929.9635065
1976	25234878.4843544
1977	35231772.653156295
1978	44549266.2473795
1979	32278195.003335398
1980	47159888.987656996
1981	71927312.70059921
1990	1142475979.61993
1991	67668345.4972453
1992	47200000
1993	40210589.6189068
1994	35401494.5975534
1995	35119851.4629075
1996	31533400.5097505
1997	30270700.5021126
1998	26271274.5348189
1999	26927929.682538297
2000	30825265.680678602
2001	28193450.444589
2002	34831910.0713619
2003	35307124.9817936
2004	32628065.1557363
2005	34123573.9513425
2006	37285145.1337507
2007	39472043.797598705
2008	42659728.7824116
2009	41721772.904938705
2010	44272442.9210916
2011	51453111.1339038
2012	70132969.8004391
2013	74532010.9372725
2014	81391929.9411777
2015	98932947.15103179
2016	85073598.4439089
2017	86725444.83921431
2018	81593932.6938754
2019	76931506.84931509
2020	79343309.60337059
2021	77919650.3033963
2022	84214047.86365381