Year	current US$
1975	15373494.2924638
1976	715546056.0304
1977	1388317593.79366
1978	2367067355.67093
1979	3552073730.38502
1980	4055957631.55661
1981	2749056746.19524
1982	1957242021.04481
1983	1620482540.10925
1984	1114800307.73004
1985	1923134424.43578
1986	4374967860.53874
1987	6544911204.07553
1988	7793190583.53783
1989	8844732706.9682
1990	10681970835.7428
1991	10014680576.3806
1992	12659768004.8053
1993	8486928044.43788
1994	7683035813.02689
1995	11004270107.2335
1996	7664842642.93935
1997	7785085152.27608
1998	9260423325.22003
1999	7134208824.8418
2000	3367980923.84584
2001	3374190723.72662
2002	2407100646.80662
2003	945704282.474129
2004	-752495011.320713
2005	-4652855517.568
2006	-6754713173.55578
2007	-5790962269.40164
2008	-13325340063.2931
2009	-14493299336.4327
2010	-15153452644.9662
2011	-10454347292.2717
2012	-8940562703.28011
2013	-3985694625.83572
2014	-5733475901.06618
2015	-3184051710.51243
2016	-1871529165.59052
2017	1647400702.28336
2018	1888334475.63073
2019	1803416328.25562
2020	-4647400948.65485
2021	-1216474463.90343