Year	constant 2015 US$
1998	14307738770.138689
1999	14317266877.610392
2000	14487316142.283339
2001	15158602674.819628
2002	15785719964.15804
2003	16665454146.119892
2004	18259152419.116665
2005	19572544893.86407
2006	21696498129.73095
2007	24115891712.059597
2008	26370800604.83678
2009	27001006561.94929
2010	28111367783.47369
2011	29855261122.12463
2012	33570898260.37639
2013	36069133938.007286
2014	37902340597.65417
2015	39446293888.16645
2016	40729919146.4576
2017	41994768308.85757
2018	42410715668.59721
2019	42556504441.261566
2020	38892156746.24685
2021	40813825713.02996
2022	42547394482.51997