Year	current US$
1970	87964516.1290323
1971	83934286.1419355
1972	64800345.544868
1973	110352995.353094
1974	121261335.752916
1975	103997314.747096
1976	108212679.053687
1977	121859984.693878
1978	145549028.536059
1979	135341788.365634
1980	205412521.355745
1981	257659428.937396
1982	211094363.363819
1983	113049366.92109
1984	112133296.83522
1985	118269801.099292
1986	173207489.7315
1987	204893881.749896
1988	212887651.042655
1989	209874812.050652
1990	224018495.399665
1991	251684234.028844
1992	278231137.265275
1993	363481489.676744
1994	377388206.74478
1995	436857946.290754
1996	526016789.683635
1997	679273406.729064
1998	687248859.843097
1999	602036777.047513
2000	523412022.868523
2001	461823649.364463
2002	292026543.917621
2003	230997354.311263
2004	300329879.120444
2005	449098486.03307
2006	531550850.677029
2007	705406704.565884
2008	997498788.918954
2009	1130172896.4569
2010	1549438129.89777
2011	1992236397.9069
2012	2103401027.47441
2013	2490703302.12899
2014	2516086927.70779
2015	2328454346.5154
2016	2405563727.82173
2017	2780416369.43598
2018	2898331130.51011
2019	2774672041.47526
2020	2345128211.93107
2021	2516634621.53591