Year	current US$
1967	22700000.762939498
1968	18899999.6185303
1969	17299999.237060502
1970	14800000.1907349
1971	28399999.6185303
1972	12989999.7711182
1973	24500000
1974	30840000.1525879
1975	36459999.0844727
1976	26899999.6185303
1977	12699999.8092651
1978	30690000.5340576
1979	24780000.6866455
1980	43500000
1981	43720001.220703095
1982	27129999.1607666
1983	66300003.0517578
1984	34799999.237060495
1985	20629999.1607666
1986	39229999.5422363
1987	37330001.8310547
1988	57090000.1525879
1989	108940002.441406
1990	122410003.662109
1991	126470001.22070299
1992	168779998.779297
1993	113760002.13623
1994	107650001.52587901
1995	88360000.6103516
1996	28440000.5340576
1997	12560000.4196167
1998	24409999.8474121
1999	21190000.5340576
2000	21700000.762939498
2001	26100000.3814697
2002	44810001.373291
2003	57040000.9155273
2004	-28239999.7711182
2005	29299999.237060502
2006	-55669998.1689453
2007	-84029998.7792969
2008	103529998.77929701
2009	187130004.882813
2010	262489990.234375
2011	-42500000
2012	-71349998.4741211
2013	-31229999.5422363
2014	37150001.5258789
2015	66519996.643066406
2016	16569999.6948242
2017	189160003.66210902
2018	286109985.35156304
2019	-134220001.220703
2020	177029998.779297
2021	32189998.626709
2022	-123669998.168945