Year	current US$
1977	6330000.072717674
1980	7789999.827742571
1981	4010000.072419643
1982	2919999.9645352364
1983	3130000.032484527
1984	4570000.031962995
1985	4579999.947920442
1986	2850000.0517815324
1987	2350000.0052154046
1988	2440000.0199675593
1989	3580000.0764429583
1990	4739999.974146482
1991	4650000.039488073
1992	4570000.076666478
1993	4119999.9637901806
1994	6740000.013262037
1995	5739999.979734424
1996	3900000.037625431
1997	4019999.977201225
1998	4380000.045523046
1999	2900000.0301748463
2000	2460000.054910781
2001	3609999.954700469
2002	7300000.071525579
2003	4519999.947398904
2004	4719999.983906747
2005	4569999.918341634
2006	4330000.028014185
2007	4259999.945759773
2008	5349999.979138374
2009	5019999.921321869
2010	5250000.000000004
2011	4729999.929666527
2012	5519963.085651409
2013	5094013.035297387
2014	4648031.339049336
2015	3947092.7417278276
2016	3089453.235268593
2017	2774092.912673951
2018	3595690.071582798
2019	5889865.99445343
2020	7246719.837188713
2021	7208065.390586859
2022	7380459.904670722