Year	current US$
1970	22860000.431537632
1971	26820000.58889394
1972	34890000.22411346
1973	43939999.69959255
1974	56900000.09536743
1975	74609999.47600059
1976	94380000.11444098
1977	86310001.62102284
1978	108530000.20980826
1979	155319999.71345073
1980	180989999.08380207
1981	157839999.94210905
1982	146829998.03498393
1983	144420002.25000083
1984	120619999.67508009
1985	116989998.62745401
1986	146550000.2279879
1987	234519997.17578286
1988	217760001.8382072
1989	196149998.47486618
1990	225180002.83837318
1991	212570002.67505652
1992	266359999.09974635
1993	335770003.0002741
1994	583130003.9291375
1995	479450008.1539155
1996	454190005.3024292
1997	371380002.97546387
1998	377940001.0108946
1999	372659999.370575
2000	387540004.25338745
2001	439919992.44689906
2002	385160003.6621096
2003	430509994.0299983
2004	467779995.91827416
2005	608969993.5913084
2006	632129995.3460696
2007	668039996.1471558
2008	689150003.4332272
2009	759260004.0435793
2010	891840007.7819825
2011	1052520000.4577637
2012	1077220002.1743774
2013	1060189983.3679197
2014	903160011.2915033
2015	939420001.9836433
2016	782450005.5313113
2017	1013109998.7030025
2018	1055680006.0272219
2019	1045790012.3596184
2020	1441570011.1389165
2021	1662989978.7902832