Year	current US$
1971	800000.011920929
1972	1250000
1973	2630000.1144409203
1974	5500000
1975	8189999.580383301
1976	8029999.73297119
1977	9500000
1978	14939999.5803833
1979	12630000.1144409
1980	13100000.3814697
1981	38409999.8474121
1982	15770000.4577637
1983	17430000.3051758
1984	16719999.3133545
1985	11760000.2288818
1986	28569999.6948242
1987	22430000.3051758
1988	27579999.9237061
1989	25500000
1990	32310001.373291
1991	51159999.8474121
1992	31170000.0762939
1993	17620000.8392334
1994	7420000.07629395
1995	16110000.610351602
1996	7329999.92370605
1997	10609999.6566772
1998	8130000.11444092
1999	10340000.1525879
2000	9489999.77111816
2001	3160000.08583069
2002	-230000.004172325
2003	-20489999.7711182
2004	12300000.1907349
2005	3400000.09536743
2006	2740000.00953674
2007	39790000.9155273
2008	15810000.4196167
2009	43180000.3051758
2010	53979999.5422363
2011	100529998.77929701
2012	83720001.2207031
2013	62240001.6784668
2014	71309997.55859381
2015	36139999.3896484
2016	4840000.15258789
2017	3089999.91416931
2018	41189998.626709
2019	-23510000.2288818
2020	309549987.792969
2021	-13729999.5422363
2022	25420000.0762939