Year	current US$
1972	20719978.33
1973	44739208.22
1974	74823417.66
1975	166671005.2
1976	410864013.7
1977	469705932.6
1978	520576477.1
1979	600949157.7
1980	793860229.5
1981	1032941284
1982	1082284912
1983	1109606079
1984	1236679321
1985	1022177368
1986	1183819458
1987	937952087.4
1988	894980407.7
1989	627070861.8
1990	499267089.8
1991	447906097.4
1992	843659606.9
1993	1040150024
1994	1093903320
1995	1243994527.88378
1996	1544146685.4725
1997	1655148095.90973
1998	1542736248.23695
1999	1664033850.49366
2000	1845133991.53738
2001	2011334086.1589
2002	2134979287.99155
2003	2201128349.78844
2004	2287447108.60367
2005	2420874471.08604
2006	2793935119.88717
2007	3326376298.68792
2008	3510160301.33039
2009	3465211267.60563
2010	3622957746.47887
2011	3683943661.97183
2012	3848309859.15493
2013	5342816901.40846
2014	6369718309.85916
2015	5348309859.15493
2016	4374647887.32395
2017	4431971830.98591
2018	4471971830.98592
2019	4564084507.04226
2020	4819154929.57747
2021	5072112676.05633
2022	4912816901.40845
2023	4940000000