Year	current US$
1970	9790000.010281796
1971	13320000.031962987
1972	26470000.173896555
1973	35760000.04075466
1974	44639999.93540349
1975	56140000.37126241
1976	88479999.80300671
1977	142509999.3422627
1978	182099999.18378899
1979	238319995.31388274
1980	325529999.10339725
1981	277279999.03075397
1982	264050004.37982383
1983	218329998.36839724
1984	236889999.89256257
1985	202559997.5902587
1986	372720005.2365661
1987	423219995.2453375
1988	455149997.5658952
1989	395119998.33025044
1990	517320002.43104994
1991	345300000.5874783
1992	463010000.04634243
1993	408949996.77315354
1994	390430003.3003093
1995	526249997.8281558
1996	492610000.7891653
1997	489539999.55952173
1998	486629997.3148852
1999	310459999.4644523
2000	448320000.8347631
2001	647289994.3254887
2002	810109990.1776766
2003	893740003.1089785
2004	1003519999.8915199
2005	1221270016.133785
2006	1035389993.9693512
2007	1328389991.2312622
2008	1152390006.9259112
2009	914179995.5591557
2010	1143649996.5824182
2011	661139999.8124692
2012	465709994.43344766
2013	494409991.4226681
2014	396169996.65647733
2015	318550005.7302415
2016	376329999.6703863
2017	391119999.3472547
2018	460300003.161654
2019	427969997.84745276
2020	441560003.54513514
2021	437500005.45755017
2022	377010000.4430859