Year	current US$
1970	48740001.656115055
1971	48200000.06631017
1972	56740001.10290941
1973	70349999.67180191
1974	59010000.18790365
1975	59180001.16199261
1976	59610000.20429494
1977	77500000.02048913
1978	79480001.66751449
1979	98070003.4406036
1980	112320003.8224459
1981	112359999.00475143
1982	136689999.83370304
1983	80770000.19326806
1984	97229998.84001914
1985	74709999.03418127
1986	122490001.05634327
1987	181449999.7012318
1988	236340006.34029478
1989	243589999.45409602
1990	253720004.06682548
1991	189320003.66598338
1992	73970000.3098697
1993	22809999.547898717
1994	17170000.335201688
1995	34470001.05306507
1996	17930001.495406047
1997	29370001.545175947
1998	34590002.07111244
1999	139150001.4476479
2000	214810006.3186137
2001	226380002.0739437
2002	224229997.40578192
2003	170279998.47382298
2004	124069998.80075455
2005	318000003.39746475
2006	204480002.52991906
2007	134120002.05740342
2008	159319997.45965007
2009	152699994.92540956
2010	73210000.66027048
2011	55039999.851956986
2012	11280000.001192085
2013	4809999.948367476
2014	-11209999.877959467
2015	-4760000.1096725445
2016	-6349999.606609341
2017	-7030000.25637444
2018	-9319999.994710103
2019	-6890000.030398376
2020	-10529999.753460336
2021	-3240000.2647191035
2022	-2620000.205934044