Year	current US$
1976	10265247.821700001
1977	12665988.5678
1978	58077274.8265
1979	11218762.934600001
1980	30544220.8245
1981	17143435.5524
1982	16035903.289700001
1983	43633020.927200004
1984	31533486.593399998
1985	35464182.3219
1986	46001547.5103
1987	70402382.97299999
1988	99889487.323
1989	105525824.2492
1990	114459784.83164601
1991	69240688.7864694
1992	87637728.6488307
1993	290224395.63135743
1994	383879883.9691814
1995	472059677.9924929
1996	600156253.933588
1997	228418393.90945014
1998	119937499.32933742
1999	124208979.40624827
2000	569638915.3107523
2001	1020322396.7825897
2002	1482922459.1392748
2003	1582688754.9530885
2004	2025195053.6797905
2005	1741788603.3774376
2006	2080127964.9659762
2007	2621971981.8362985
2008	4701189758.249693
2009	4201177508.7320294
2010	5454460712.628645
2011	5523767734.617715
2012	6396540145.976544
2013	8117762336.952023
2014	8044180133.178981
2015	6483025388.32666
2016	7239640556.174641
2017	8775459507.233763
2018	8804725345.86118
2019	9767356853.902754
2020	9049099493.913307
2021	9422748431.206388
2022	11428109840.277998