Year	current US$
1964	12678000
1965	9220000
1966	7040000
1967	5050000
1968	2910000
1969	7420000
1970	15360000
1971	17685148.4739864
1972	18486869.338545
1973	21483318.0587651
1974	14188685.5433159
1975	30712933.9090549
1976	49030349.4830086
1977	94405489.5333384
1978	81303996.469142
1979	89986681.6573312
1980	94501736.620465
1981	61300096.3928814
1982	29488828.9551574
1983	26938811.7163784
1984	19731397.1998759
1985	29472337.4340949
1986	69072776.0449158
1987	60731681.8226958
1988	69384229.1181655
1989	99620884.4324125
1990	105037968.445462
1991	141384049.550129
1992	174172535.784509
1993	162984067.449269
1994	204703171.840123
1995	209447915.508199
1996	139601358.464954
1997	113041381.039247
1998	65524132.2562041
1999	47982830.7884671
2000	32920287.2651183
2001	17708961.7401183
2002	58776329.559297
2003	66965314.0226551
2004	65752699.2508293
2005	100082252.808507
2006	130527587.059737
2007	176329729.145465
2008	265701340.18856
2009	322043553.578176
2010	330734336.971923
2011	293975922.888204
2012	307157909.647554
2013	328150659.626304
2014	315980290.456431
2015	135115722.176262
2016	94051538.1306259
2017	96149938.427552
2018	66887906.4276545
2019	109902224.097543
2020	88492037.6699625
2021	264405557.812982
2022	156779258.735117
2023	88357252.0453753