Year	constant 2015 US$
1996	6537441656.227042
1997	5396643072.695798
1998	5086634221.843822
1999	5219377010.724248
2000	5447224861.928242
2001	5697237220.476424
2002	6093296503.020593
2003	6642586915.378345
2004	6892634313.972955
2005	7264760640.909696
2006	7682643524.898165
2007	8575197041.038129
2008	9387700432.361685
2009	9486236736.21665
2010	9671015671.146517
2011	9828776982.386234
2012	9841139033.683596
2013	10034742981.804869
2014	10360621837.09121
2015	10453745503.383978
2016	10708592241.72015
2017	10979647678.429745
2018	11298032383.332584
2019	11665785836.750528
2020	11339801972.316223
2021	11913848287.59217
2022	12574893412.547571
2023	13049102861.79041