Year	current US$
1978	39500000
1979	42600000
1980	45278871.8678
1981	43907133.8904
1982	34680262.77255
1983	35715055.5985
1984	38007203.96335
1985	36927695.8971
1986	41331317.5493
1987	53536579.9517
1988	57969483.44435
1989	63827925.4066
1990	73202726.269661
1991	73024319.386423
1992	82382399.557303
1993	84181466.0921375
1994	88038331.872969
1995	98087767.0710685
1996	100490632.46578549
1997	98873812.3642275
1998	98865151.8829495
1999	110606223.5718585
2000	121132255.0126425
2001	111446275.9036015
2002	114166333.62814799
2003	136856243.77294847
2004	144852214.5366155
2005	143587057.923018
2006	151398821.0892165
2007	148301922.95953798
2008	144876272.8545075
2009	144239909.90706348
2010	152967107.955376
2011	162348126.1378995
2012	198883565.67117548
2013	205132719.0279595
2014	217663412.0069455
2015	210843760.43251002
2016	172532335.0079485
2017	194017638.209817
2018	163630906.253447
2019	155951751.5889765
2020	170954385.853937
2021	191621877.29027748
2022	220238312.83198002
2023	295500000