Year	current US$
1970	134799999.65429297
1971	140999998.92711633
1972	203679999.47071078
1973	223029999.85218042
1974	318780000.3886222
1975	358570002.4031102
1976	337129998.9521502
1977	320759999.03678894
1978	392050000.36954874
1979	436750006.6347419
1980	636669995.367527
1981	720590001.8531832
1982	646340000.5027654
1983	578229998.1936812
1984	698719987.9679823
1985	708970000.5389751
1986	913430002.8365104
1987	1084670001.5664105
1988	1217029988.178984
1989	1438459991.3451815
1990	1823879997.7898595
1991	1732800011.992455
1992	1630519999.3550777
1993	1493480011.4128733
1994	1429060023.2258437
1995	1398749986.1493711
1996	1218849995.2834103
1997	1250820011.6343794
1998	892720001.1834503
1999	879890001.6900148
2000	825350008.152425
2001	633020004.2016804
2002	1095310006.3372407
2003	2235229996.5135746
2004	2254359991.4237857
2005	991330009.9149344
2006	1226490003.837272
2007	1392900007.7676017
2008	1291999996.2188306
2009	1096010011.509061
2010	1458169988.1777172
2011	2153000045.6720595
2012	1264319990.5231597
2013	1695980014.4396722
2014	1248269985.7503173
2015	1085500002.1811578
2016	882080002.7940422
2017	1127160000.5757065
2018	1239300005.346537
2019	1479320006.910711
2020	2073389999.8255064
2021	1960889998.0746198
2022	1960490023.070946