Year	current US$
1967	14997867.203254353
1968	34208814.92899791
1969	34713743.93872511
1970	37326636.41947016
1971	39024314.21827889
1972	38446188.67914826
1973	28489944.709429886
1974	-81498642.9760473
1975	-32969114.318363477
1976	39480113.39955632
1977	100765388.06401198
1978	-25922205.60990528
1979	10137656.23210396
1980	-253692317.74461094
1981	-238588500.83137047
1982	-205108695.84700206
1983	-209675041.99193445
1984	-219641917.5351361
1985	-179019515.79302564
1986	-70948782.03404814
1987	109100940.93643089
1988	18118235.919349246
1989	177683914.42380625
1990	118464083.20711674
1991	8633413.86651399
1992	25583926.946040917
1993	-1103319.1642176702
1994	67770089.25010966
1995	112729304.89016508
1996	131306624.81654128
1997	311531034.0457611
1998	354352570.2588148
1999	287946440.3908735
2000	198723430.13685974
2001	447886857.6938568
2002	550708296.2107049
2003	646882637.4821674
2004	745692470.7452164
2005	795577708.0770551
2006	1179096067.5024316
2007	1266586488.1671374
2008	1123480134.837029
2009	1535240726.72392
2010	1252213389.6532536
2011	1463541667.7055733
2012	1713908798.8366134
2013	580869039.0904205
2014	665559739.6397133
2015	682584599.3324713
2016	993770536.5819054
2017	1221413511.5108883
2018	1597537641.8729436
2019	1777025329.2712898
2020	1884245849.410463
2021	1990936987.0296175
2022	1525449217.983385
2023	1799106306.7380598