Year	current US$
1970	17999999.76158138
1971	29099999.90463257
1972	29190000.53405765
1973	37499999.76158142
1974	35649999.856948845
1975	66580000.46014777
1976	84939998.62670898
1977	58700001.89542779
1978	56230001.21116642
1979	45629999.16076654
1980	58519999.999553
1981	91100000.45970084
1982	76759998.17252153
1983	48750000.784173615
1984	70509998.9958108
1985	93370001.10559161
1986	113889997.97776343
1987	144050000.25033945
1988	153859999.37728053
1989	168209998.28912276
1990	146469999.7901917
1991	107389999.2108345
1992	158610000.04224485
1993	148620004.07651067
1994	147590002.63921955
1995	78399997.85833059
1996	50209999.20368196
1997	54170002.46979296
1998	15279999.47220088
1999	-3739999.5848536324
2000	32220000.199973524
2001	27860000.088810902
2002	-118579999.69646299
2003	13879999.48300419
2004	10569999.743253026
2005	28110000.103712168
2006	32219999.879598685
2007	29959999.397397015
2008	15989999.994635694
2009	35430000.74476005
2010	115440001.90496439
2011	161570004.5526027
2012	91060002.0736455
2013	190139998.54773277
2014	192669999.86581448
2015	86979997.41509555
2016	203539994.1690269
2017	321969991.344959
2018	420490015.69300854
2019	436809997.47663736
2020	426470006.1269107
2021	267729992.66535002
2022	294900004.4055285