Year	current US$
1970	9490000.061690805
1971	9730000.171810387
1972	9500000.050291415
1973	9050000.011920933
1974	10060000.095516436
1975	16610000.066459171
1976	15920000.06511808
1977	21150000.056251884
1978	28039999.812841415
1979	41169999.74288047
1980	46389999.859035015
1981	47060000.009834774
1982	45759999.53597785
1983	54230000.153183945
1984	59640000.18686055
1985	76079999.4021654
1986	89619998.73071909
1987	103819999.76933002
1988	111520000.57697304
1989	151910001.3673305
1990	172790001.34207317
1991	210889999.9260903
1992	273430000.4839897
1993	325589996.57630914
1994	289150001.10864633
1995	271710001.3494494
1996	242899999.38011175
1997	130399999.85694884
1998	122600000.20265575
1999	128019999.8021126
2000	148580000.69856644
2001	155969999.37295914
2002	146849998.83174902
2003	180489999.0558625
2004	176460000.39577484
2005	221149999.67813492
2006	266700000.82254413
2007	389140001.8930433
2008	426499997.37739563
2009	424209999.3824958
2010	457529995.5308436
2011	440170003.23534024
2012	382560015.5889987
2013	425869131.56509393
2014	494636125.02813345
2015	495098786.5924835
2016	501349086.04621905
2017	517892889.1420367
2018	512713717.2818186
2019	529145998.12030804
2020	514917002.0222663
2021	475661000.90742147
2022	464173001.88541436