Year	current US$
1990	779400000
1991	774000000
1992	868888888.888887
1993	831173553.719007
1994	820107418.596846
1995	726267983.334483
1996	679547384.615383
1997	759867849.414573
1998	819459847.319198
1999	655292792.857656
2000	685038756.174783
2001	665814036.926615
2002	788698685.736781
2003	968107764.086213
2004	1255727395.41667
2005	1688677368.80223
2006	2103539190.11655
2007	2184994306.33737
2008	2779862732.44384
2009	2189456273.54099
2010	2774972143.50453
2011	2754497321.80905
2012	3063043393.34293
2013	3556336589.00901
2014	3585480109.60485
2015	2573943573.48139
2016	2266976957.64073
2017	2476338808.26388
2018	2732988939.19364
2019	2965031577.90995
2020	2783973758.85875
2021	2914633546.38511