Year	current US$
1976	19180785.031924617
1977	25813177.227936897
1978	37037212.83394801
1979	41925576.1805879
1980	56302538.02204336
1981	54956884.629667014
1982	48411166.263413504
1983	34408659.40012784
1984	34488577.76467527
1985	40058329.65604493
1986	49695546.33699824
1987	49143531.555669196
1988	70780748.17867038
1989	78743122.827446
1990	89249521.62866084
1991	84049066.53195465
1992	97129073.19549386
1993	132781495.36054291
1994	136083646.50500417
1995	162265062.26506227
1996	212978027.72691602
1997	166363291.63435358
1998	219255164.2880219
1999	273411642.4894712
2000	163019221.65165597
2001	267441479.71965036
2002	204741157.5806204
2003	82315255.54847625
2004	155527581.8181818
2005	233416181.8181818
2006	327917046.8207284
2007	314837354.09024847
2008	270790440.72358084
2009	238484115.28632748
2010	363506582.04337394
2011	368675777.5926918
2012	411032710.0106531
2013	514158717.2518408
2014	403159346.96332866
2015	385023079.2196892
2016	394241742.90232605
2017	411055147.0335017
2018	392316864.27480984
2019	412711317.7631696
2020	294778281.6798256
2021	244903558.83207634
2022	314282759.6136566
2023	344155992.2018024