Year	constant 2015 US$
2000	3874123557.366871
2001	4402489879.975538
2002	4861082576.390528
2003	5212388942.548025
2004	5551128596.869783
2005	6020224829.110867
2006	6305321318.303879
2007	6732215779.504527
2008	8002395627.280377
2009	9101330043.538147
2010	10703872361.828953
2011	11770920971.219938
2012	12348742218.668222
2013	12988012012.365646
2014	13561848126.338772
2015	14419966675.824175
2016	14561203643.424759
2017	14441270121.343111
2018	15415019542.045168
2019	15149321450.115688
2020	14133269644.366774
2021	14680660651.066286
2022	14992365759.314255