Year	constant 2015 US$
1999	3229031579.392988
2000	3272958551.584852
2001	3384776605.28524
2002	3504648711.1750174
2003	3607659119.5305796
2004	3733867386.1759477
2005	3925499920.3389883
2006	4032250762.0978246
2007	4094112047.937718
2008	4275978915.5476265
2009	4350223156.622072
2010	4485890421.902632
2011	4372102099.201106
2012	4451274371.702412
2013	4651214109.73962
2014	5126921887.744219
2015	5283074963.824345
2016	5425893963.471614
2017	5571395357.234049
2018	5693950478.761916
2019	5756558489.685016
2020	5172125979.2526
2021	5023067308.005422
2022	5598379306.531182