Year	current US$
1980	1863503512.5957644
1981	1926637965.0692465
1982	1823096080.4169111
1983	1755609814.416559
1984	1835331539.76187
1985	1758395991.655045
1986	1920749795.5715172
1987	1818311426.239918
1988	1842085779.2684288
1989	1916499614.862489
1990	2140023600.5490687
1991	2266635087.6233172
1992	2490014917.8303204
1993	2641947059.305511
1994	3030389426.659576
1995	3326974119.4280386
1996	3594118771.6876383
1997	3539777826.3922615
1998	2995048855.370051
1999	3317453745.001206
2000	3107573224.3176103
2001	3015341156.8398266
2002	3211083240.84981
2003	3841970665.0473046
2004	4484991761.602451
2005	5001569279.162373
2006	5086218184.491228
2007	5706011954.813946
2008	6151646291.040445
2009	5554008306.9130335
2010	6045785594.321773
2011	6863556256.287664
2012	7267632765.044419
2013	7863376109.430429
2014	8348458285.327702
2015	8139785880.16762
2016	8488225494.181731
2017	9051758821.250546
2018	9584125003.446598
2019	9595218032.94174
2020	8644292731.003447
2021	8606767544.87456