Year	current US$
1970	25999999.511986975
1971	40209999.682381734
1972	67130000.13679264
1973	117669999.26976863
1974	115889999.9205023
1975	103499999.40209088
1976	90259999.08149253
1977	140229996.27701935
1978	356969999.60578936
1979	585879997.6762389
1980	606720007.9485766
1981	504499992.1526759
1982	634239994.2651396
1983	457549997.5029372
1984	433710005.5646149
1985	556839997.6957594
1986	918489994.9096138
1987	1102340004.3509898
1988	1343879970.7964063
1989	1239810007.7677524
1990	1042559981.8900234
1991	993180004.6004362
1992	985359992.8617473
1993	1192859985.0460885
1994	1500220000.1198802
1995	1626949999.2690985
1996	1205179994.9966369
1997	985550001.3567508
1998	1128860008.4688518
1999	1115019987.8439307
2000	1288699993.6625361
2001	1159040001.59353
2002	1002989995.9079921
2003	1046109994.3481382
2004	897600010.1137906
2005	1268380018.856376
2006	1086870004.3205173
2007	1851919980.62469
2008	1390089993.2365859
2009	1848679983.0496318
2010	2631169971.883297
2011	2555070010.9004974
2012	2996810016.632079
2013	5448550083.160406
2014	2293740020.006895
2015	2462200029.1347504
2016	2540389970.4813957
2017	3327810047.1794634
2018	3265650059.3125873
2019	3439530044.7940836
2020	4577479987.621308
2021	4154020021.3193865
2022	4387950011.730194