Year	current US$
1977	8699999.945238225
1980	27409999.877214435
1981	24729999.86819922
1982	22659999.992698427
1983	25249999.985098843
1984	23780000.023543835
1985	25649999.847635623
1986	21169999.9962002
1987	23329999.944195148
1988	25309999.95768071
1989	32649999.970570195
1990	44250000.36880374
1991	40210000.17412007
1992	32069999.724626556
1993	34660000.05789101
1994	48290000.149980195
1995	64909999.58850443
1996	71539999.82774256
1997	72299999.79399146
1998	76659999.9796599
1999	62189999.95477497
2000	51170000.34078956
2001	87110000.12792642
2002	104269999.22469263
2003	109579999.77469446
2004	85789999.63402748
2005	83209999.97109178
2006	89479999.66144559
2007	100470000.50544737
2008	137389998.85320663
2009	133519999.62329865
2010	135610000.0143051
2011	129769999.02725215
2012	137112436.5925789
2013	142175195.63436505
2014	138368608.5343361
2015	132240106.76145555
2016	112246806.59174918
2017	93527930.02128601
2018	91557590.24620059
2019	128252186.7752075
2020	135675960.3023529
2021	143563775.18177032
2022	166801431.35786054