Year	constant 2015 US$
2000	17964016494.733593
2001	19088408871.430866
2002	19914133385.497265
2003	20443219282.072456
2004	20679242022.1401
2005	21172954465.42306
2006	22615353151.075104
2007	24066805799.198425
2008	25289286342.032303
2009	26159604270.23884
2010	26358963076.413116
2011	27393846442.619473
2012	28147094571.515125
2013	28339059043.802547
2014	28918444892.043446
2015	29431397320.07228
2016	29583007340.014595
2017	30738451958.89682
2018	31677012901.329163
2019	32843342155.555058
2020	33733502533.53864
2021	34961668745.174126
2022	35555354119.43009
2023	36020757123.56008