Year	current US$
1977	6509999.977424735
1980	18069999.99657273
1981	17230000.11593103
1982	17480000.0488758
1983	19679999.95313585
1984	19199999.766424295
1985	20959999.866783615
1986	19070000.106468797
1987	21020000.018179405
1988	25959999.9934435
1989	32340000.08925795
1990	42590000.14513731
1991	44299999.997019775
1992	33599999.85434116
1993	34699999.92288649
1994	52989999.88846481
1995	68409999.2364645
1996	64540000.01400708
1997	70419999.67768788
1998	68840000.27552247
1999	58890000.10490415
2000	46620000.30651688
2001	72830000.20310283
2002	92989999.70033765
2003	88310000.46059492
2004	80239999.78601933
2005	78279999.95835127
2006	84679999.85814093
2007	96940000.31612812
2008	141459999.9040365
2009	135879999.44761398
2010	135419999.59386885
2011	131239998.56598675
2012	139507302.50030753
2013	137349889.93406296
2014	136817395.478487
2015	129685923.24107885
2016	110442265.48075676
2017	94517384.17148589
2018	91220530.38328888
2019	130880466.82626007
2020	140051600.97777843
2021	143921244.85969543
2022	170061371.5350628