Year	current US$
1960	21899999.6185303
1961	25899999.6185303
1962	37000000
1967	18700000.762939498
1968	25729999.5422363
1969	15880000.1144409
1970	46990001.6784668
1971	44840000.1525879
1972	53380001.0681152
1973	67569999.6948242
1974	54090000.1525879
1975	44200000.762939505
1976	39680000.3051758
1977	44270000.4577637
1978	43080001.8310547
1979	75800003.0517578
1980	85410003.6621094
1981	68029998.7792969
1982	105250000
1983	61840000.1525879
1984	78029998.7792969
1985	56619998.9318848
1986	90470001.2207031
1987	140279998.779297
1988	156210006.71386698
1989	161500000
1990	190130004.882813
1991	139440002.44140598
1992	7960000.03814697
1993	-42580001.8310547
1994	-48979999.5422363
1995	-54500000
1996	-62509998.3215332
1997	-48779998.779296905
1998	-44549999.237060495
1999	71930000.3051758
2000	143960006.71386698
2001	119650001.52587901
2002	127269996.64306599
2003	76889999.3896484
2004	-519999.980926514
2005	175990005.493164
2006	75620002.746582
2007	42430000.3051758
2008	75489997.8637695
2009	81089996.3378906
2010	34360000.6103516
2011	24579999.9237061
2012	-2420000.07629395
2013	-9130000.11444092
2014	-19069999.6948242
2015	-8750000
2016	-9899999.61853027
2017	-12760000.2288818
2018	-14619999.8855591
2019	-13590000.1525879
2020	-16829999.9237061
2021	-10380000.1144409
2022	-4800000.19073486