Year	current US$
1976	480438459.5194181
1977	498892645.9934554
1978	665592056.1442332
1979	934895595.37447
1980	990235522.9260124
1981	929518282.5773066
1982	926039574.099739
1983	920787704.4306624
1984	831581206.1958703
1985	883167980.7551631
1986	874023309.3872496
1987	1159700119.1679404
1988	1767303143.199932
1989	1328318051.940638
1990	1574573055.028463
1991	1307563010.06268
1992	1887084008.5930748
1993	1952693671.1803284
1994	2173882598.1472287
1995	2401268834.258527
1996	2527202527.202529
1997	2518291901.8303285
1998	2504555533.601173
1999	2650424666.484013
2000	2571709974.3436995
2001	2727438595.2718177
2002	2487808309.1062613
2003	2710991818.3876104
2004	3368215394.497364
2005	3756262364.154881
2006	4019984598.3358736
2007	4619941078.152758
2008	5648701109.856134
2009	5075780859.454557
2010	5297610730.753107
2011	4286455065.2917833
2012	4754427056.934157
2013	4576900784.267472
2014	4555288850.928475
2015	3124195501.1788697
2016	3068388137.9866896
2017	3119377538.0514
2018	7174398263.26939
2019	7730092991.320745
2020	5417957621.992014
2021	6819783768.040796
2022	8481020990.872004