Year	current US$
1964	2900000.09536743
1965	13890000.3433228
1967	6750000
1968	7809999.94277954
1969	8699999.80926514
1970	15619999.8855591
1971	11439999.5803833
1972	12739999.7711182
1973	24670000.0762939
1974	32500000
1975	55310001.373291
1976	58319999.6948242
1977	71339996.3378906
1978	79029998.7792969
1979	90589996.3378906
1980	144770004.272461
1981	151210006.71386698
1982	61060001.373291
1983	70250000
1984	60790000.9155273
1985	60090000.1525879
1986	101120002.746582
1987	104000000
1988	115190002.441406
1989	92360000.6103516
1990	148479995.727539
1991	122559997.558594
1992	94180000.3051758
1993	42490001.6784668
1994	48560001.373291
1995	81800003.0517578
1996	58490001.6784668
1997	32819999.694824196
1998	27020000.4577637
1999	-4880000.11444092
2000	-8880000.11444092
2001	73480003.3569336
2002	59369998.9318848
2003	43090000.1525879
2004	-315790008.544922
2005	72809997.55859381
2006	13050000.1907349
2007	6849999.90463257
2008	4940000.05722046
2009	7210000.03814697
2010	2480000.01907349
2011	970000.028610229
2012	2410000.08583069
2013	1830000.04291534
2014	870000.004768372
2015	2130000.1144409203
2016	720000.028610229
2017	409999.99642372096
2018	1399999.97615814
2019	2559999.94277954
2020	360000.01430511504
2021	490000.009536743
2022	589999.973773956