Year	current US$
1977	42947636.29629629
1978	53907635.55555555
1979	60180553.7037037
1980	69357630.74074073
1981	69916555.92592593
1982	75504811.85185185
1983	80199600.74074073
1984	90733545.18518518
1985	105121061.85185185
1986	118191428.51851851
1987	128620998.51851851
1988	140788138.5185185
1989	164425489.6296296
1990	175431494.07407406
1991	185201518.5185185
1992	197063111.11111107
1993	202190518.5185185
1994	212599518.5185185
1995	223253148.14814812
1996	239598037.03703701
1997	252722999.99999997
1998	288838111.1111111
1999	309311555.5555555
2000	336498148.1481481
2001	347335481.48148143
2002	353918518.5185185
2003	381929518.51851857
2004	397799074.07407403
2005	428186370.3703703
2006	446038111.1111111
2007	493045148.1481481
2008	550787518.5185184
2009	536831222.2222222
2010	527111111.1111111
2011	538403703.7037036
2012	563651851.8518518
2013	587640740.7407407
2014	622333333.3333333
2015	665629629.6296296
2016	710581481.4814814
2017	754459259.2592592
2018	770196296.2962964
2019	811396296.2962962
2020	697129629.6296296
2021	732300000
2022	787581481.4814813
2023	849022222.2222222