Year	current US$
1970	6900000.032037495
1971	8369999.999180432
1972	12250000.035390265
1973	19940000.02183019
1974	33939999.85791744
1975	45160000.23856755
1976	76649999.66695906
1977	143039999.9916553
1978	158519999.3494899
1979	235049994.7816133
1980	308720000.38623816
1981	271479999.2758781
1982	244220001.61185858
1983	225039997.97999847
1984	249029999.72179538
1985	213759998.1259555
1986	366610004.49210405
1987	411949996.5980648
1988	488009995.7585335
1989	444109996.87016016
1990	577679998.9715216
1991	369770001.3499707
1992	525489997.7091699
1993	465319994.961843
1994	479930000.42065984
1995	675019999.7667224
1996	635639997.5717069
1997	576199993.0180612
1998	631210001.6139448
1999	413729996.6569991
2000	555130000.7775426
2001	866539992.2579529
2002	966939994.3333123
2003	1013720002.7797374
2004	1166130002.766848
2005	1114390005.419031
2006	1016489990.8639493
2007	1323129984.952509
2008	1412470007.3264542
2009	1196190003.1492112
2010	1375300002.1912153
2011	846720002.6866052
2012	614259990.3903902
2013	588609996.8049674
2014	474739996.82813877
2015	368840006.34774554
2016	420209997.9929625
2017	414770003.54044145
2018	466690004.9950929
2019	503799996.7820942
2020	504480004.1019918
2021	457240006.66663045
2022	442250002.7045608