Year	current US$
1981	39999.9991059303
1982	4469999.79019165
1983	5000000
1984	6690000.05722046
1985	15479999.5422363
1986	17969999.3133545
1987	32169998.168945298
1988	35599998.4741211
1989	37380001.0681152
1990	67709999.0844727
1991	39979999.5422363
1992	62349998.4741211
1993	69550003.0517578
1994	68599998.4741211
1995	53740001.6784668
1996	38400001.5258789
1997	45000000
1998	52279998.779296905
1999	31420000.0762939
2000	29200000.762939498
2001	24319999.6948242
2002	28739999.7711182
2003	28440000.5340576
2004	34909999.8474121
2005	30030000.6866455
2006	29600000.3814697
2007	32900001.5258789
2008	54340000.1525879
2009	11050000.1907349
2010	9020000.45776367
2011	-1970000.02861023
2012	-4079999.92370605
2013	-2250000
2014	-6760000.228881841
2015	-10399999.6185303
2016	-11539999.961853001
2017	-12539999.961853001
2018	-11380000.1144409
2019	-12380000.1144409
2020	-11739999.7711182
2021	-20899999.6185303
2022	-10449999.8092651