Year	constant 2021 US$
1970	8341450018.405925
1971	9096189787.387848
1972	9325059994.220737
1973	8919660006.523132
1974	9954679938.3536
1975	7423059961.17741
1976	6179240023.136145
1977	5402220037.607474
1978	6476759878.911081
1979	7225790096.569811
1980	7564109975.531702
1981	8354249964.412308
1982	8201880076.993263
1983	8296850055.046383
1984	8587249973.602606
1985	8873159868.851305
1986	8537480023.846039
1987	8544890115.395193
1988	9102270080.206924
1989	9571489834.636461
1990	10174710027.158278
1991	9382900001.853712
1992	11647830004.060646
1993	10895969940.314081
1994	10675700039.952997
1995	9924000159.520658
1996	8786480043.523014
1997	8029730013.787754
1998	10127599819.18335
1999	10838099902.629864
2000	10023720208.168037
2001	9479820010.185236
2002	9028160066.604618
2003	7941250125.885018
2004	7066080027.580265
2005	9490009890.55634
2006	7926300050.735472
2007	8026159955.978395
2008	7358629964.828504
2009	8961489915.84778
2010	8467950012.207036
2011	5960189952.8503475
2012	7500389960.289005
2013	10431140079.4983
2014	8092010051.727297
2015	8140749962.806706
2016	7442880115.509033
2017	7729380073.547364
2018	7364899957.656865
2019	6304269936.561588
2020	11676939917.087578
2021	8544139965.057386