Year	constant 2015 US$
1995	7265056419379.621
1996	7202867493276.454
1997	7510723698710.644
1998	7187155527451.517
1999	7231459047098.489
2000	7360688894442.003
2001	7605182389287.459
2002	8632992465110.299
2003	8597364242081.252
2004	9639669139501.234
2005	10249939911119.771
2006	11401925899290.227
2007	13113196949982.928
2008	13648065802083.383
2009	14520106924159.475
2010	15633170144039.03
2011	16327667741901.756
2012	17332000738800.656
2013	18161010286250.652
2014	19130741333876.57
2015	20049076512365
2016	21151568666667.195
2017	22361160412682.438
2018	23129496494466.715
2019	23908814350233.016
2020	23361029551226.504
2021	24882672875703.52