Year	current US$
1970	66449999.16851522
1971	75370002.0313264
1972	77500000.00000012
1973	65540001.24335292
1974	118059997.91622168
1975	130080000.22172922
1976	191250000.29802278
1977	167110000.81896773
1978	259689998.1498723
1979	294360001.20639753
1980	297810003.1614301
1981	359529994.8453907
1982	361820002.19821924
1983	264030000.5674367
1984	274289998.531342
1985	292949998.7959859
1986	332039996.74320203
1987	338969993.7105177
1988	358569998.2643131
1989	478010003.32832307
1990	624019990.2057652
1991	447869994.5211412
1992	389990002.87055933
1993	379549999.4754791
1994	403199995.5177305
1995	444520002.6035304
1996	433570008.0394743
1997	510159994.6022036
1998	294440000.0572205
1999	235580001.05619445
2000	197860003.4713745
2001	244780000.03099442
2002	230720001.6975402
2003	164960000.60439128
2004	288579994.48478264
2005	299590001.70230913
2006	330789992.92850506
2007	459759999.75204504
2008	501199993.61038125
2009	619740011.2152107
2010	547880008.6975101
2011	364670004.84466535
2012	301819994.6880338
2013	353049994.3494802
2014	395360001.3256077
2015	200019999.74250785
2016	190039995.8491325
2017	229609999.65667716
2018	355490000.72479296
2019	505739999.7711175
2020	549110000.6103516
2021	681949996.9482422