Year	current US$
1989	1073687045.37726
1990	1010175636.36364
1991	925446519.84613
1992	801009733.333334
1993	760318680.263158
1994	1019748556.7917
1995	1266598090.18396
1996	1208754784.301
1997	1274215906.86956
1998	1330013791.37207
1999	1073954367.8421
2000	1043933564.42029
2001	1213108101.22157
2002	1468472939.04099
2003	1829139804.21687
2004	2319929542.3599
2005	3229936115.61932
2006	4323612944.91055
2007	5703550595.02112
2008	6935970621.2938
2009	6446085949.64419
2010	5344291035.79723
2011	5460998531.65386
2012	4950416101.14758
2013	5413129090.28295
2014	5922011543.04244
2015	5217140864.93744
2016	5170997664.06574
2017	6189388843.51207
2018	7714487142.65271
2019	8425341990.89667
2020	8426143346.0394
2021	9509489016.42722