Year	current US$
1971	6783030120.10406
1972	7487863955.6279
1973	10030230007.6711
1974	12782932557.8218
1975	13822839175.6846
1976	15711857110.2417
1977	18297020555.1183
1978	22148366462.0539
1979	25086550579.4027
1980	29239420536.2384
1981	31157847733.6677
1982	32605171751.8121
1983	35853870927.6206
1984	36958739305.9908
1985	33937117647.6952
1986	37379745638.1932
1987	44067826901.7443
1988	54017656209.8767
1989	63538395380.9155
1990	73597295028.2663
1991	84745297823.4288
1992	95922687323.7903
1993	110807808910.06
1994	125426638074.278
1995	143697457768.425
1996	152814794901.455
1997	120801523229.529
1998	87080180698.3615
1999	99452316678.4323
2000	99251282212.0878
2001	92832213141.3015
2002	105281419377.015
2003	119818481224.828
2004	136712129381.852
2005	148841594273.521
2006	176665300078.688
2007	211872449254.181
2008	229756682472.93
2009	224217157774.247
2010	270202029568.499
2011	296588458455.031
2012	307802226912.153
2013	317455793479.079
2014	309975595504.157
2015	306808192397.832
2016	319338426140.403
2017	353848493160.986
2018	389678054611.734
2019	424075099664.084
2020	389835503616.91
2021	386826546804.11