Year	current US$
1990	891976461.699589
1991	753568383.941375
1992	741599300.401704
1993	784251774.380807
1994	786658801.715506
1995	838958310.437785
1996	880226820.296179
1997	877307763.992076
1998	864174685.57028
1999	786724652.728891
2000	805945160.822057
2001	896401981.899993
2002	878660389.489014
2003	1007147482.83976
2004	1042891353.74466
2005	1116547195.81024
2006	1200439482.00769
2007	1354620812.44299
2008	1342960518.13561
2009	1185065933.19605
2010	1278590621.62972
2011	1480681115.7341
2012	1398773599.50562
2013	1282024805.80689
2014	1415855304.34971
2015	1549476860.32577
2016	1493561548.12992
2017	1641862072.94253
2018	1602410756.58623
2019	1596086934.28687
2020	1532806854.32171
2021	1701639976.75257