Year	current US$
1990	2874900360.52476
1991	3155815787.04125
1992	3400425693.89394
1993	3074188432.24116
1994	2916582902.78625
1995	2678918628.30025
1996	2441555008.41285
1997	2189378726.36936
1998	2325465318.69784
1999	2177161070.78517
2000	2230177592.64786
2001	2279139397.1495
2002	2641220929.62034
2003	3070822691.2236
2004	3486526713.83971
2005	3936881681.42269
2006	4544258145.30094
2007	5109186881.17434
2008	6495538101.88174
2009	5899369275.54154
2010	6564422236.66142
2011	7321377514.23991
2012	7599734062.58615
2013	8404923942.51421
2014	7044932334.23925
2015	6632219610.4553
2016	7259520479.2203
2017	8028959846.00032
2018	8486116545.43106
2019	8649616910.70695
2020	8264804186.88014
2021	8713723746.20365