Year	current US$
1981	1970000.0137090688
1982	2679999.995976685
1983	3310000.0731647033
1984	5570000.067353252
1985	6630000.000819565
1986	10359999.887645248
1987	17600000.033155087
1988	8800000.067800282
1989	9440000.094473368
1990	12690000.042319294
1991	7270000.055432315
1992	4839999.986812471
1993	7080000.162124641
1994	5819999.979808932
1995	7850000.163540244
1996	6419999.96453524
1997	2370000.0718235937
1998	1110000.0627338933
1999	-500000.01490116125
2000	1929999.981075529
2001	2449999.9303370705
2002	5650000.123307112
2003	3979999.9594688443
2004	7930000.105872748
2005	5030000.023543839
2006	7880000.110715626
2007	25509999.94948506
2008	4009999.8787045437
2009	9169999.70003962
2010	9050000.071525581
2011	11289999.872446068
2012	16520000.092685219
2013	18969999.82558191
2014	7529999.881982811
2015	6641477.443277829
2016	13716756.727546442
2017	20324688.218533985
2018	24813175.118528318
2019	24278107.903897773
2020	13312397.748231892
2021	11863999.936729671
2022	17149410.102516413