Year	current US$
1970	73339999.87319112
1971	56300000.92461701
1972	56080000.61847265
1973	53310000.319033846
1974	59849999.75003306
1975	56049999.92251402
1976	71520000.077784
1977	64580000.21427872
1978	106029997.11781737
1979	132529997.7697432
1980	168729998.32034117
1981	165619998.70277944
1982	128679997.48885626
1983	96400000.5498528
1984	89589998.11857939
1985	89360001.59196559
1986	89899998.38918446
1987	100490000.33363694
1988	178710000.93221667
1989	265409999.53448793
1990	190779997.7064133
1991	271720000.4458426
1992	198209994.3999201
1993	127430000.75221056
1994	142380001.22643995
1995	151189999.07374376
1996	163159999.9815226
1997	141149995.49835926
1998	166140003.906563
1999	165739999.2235004
2000	167379998.86274338
2001	148969998.77318734
2002	249500001.04308134
2003	320760007.9700351
2004	326739997.6439777
2005	2414619889.9149942
2006	3742760000.3182936
2007	747350009.601563
2008	495280001.6738477
2009	654009995.7808852
2010	860170000.5307798
2011	852079982.5750301
2012	1003310018.7107925
2013	1320210005.0337617
2014	1315629987.9625444
2015	1368809971.5113645
2016	1376149996.2620451
2017	1265610022.9695444
2018	1138819991.521536
2019	1051629992.2019238
2020	840509983.2490084
2021	558770003.7136675
2022	317550003.0331314