Year	constant 2015 US$
1995	5662499444644.545
1996	5487728268070.621
1997	5722600939120.98
1998	5319148096857.975
1999	5307191212720.841
2000	5389457789630.139
2001	5575843509530.3955
2002	6500015711146.017
2003	6349886049463.763
2004	7223789628117.423
2005	7669303982194.335
2006	8609786206587.111
2007	10113254677190.89
2008	10545233259143.926
2009	11175951727610.592
2010	12019781636381.812
2011	12555064178838.408
2012	13326644323301.709
2013	13922494733300.125
2014	14628946375376.842
2015	15229755779218.14
2016	15983400851993.844
2017	16877597485936.307
2018	17336519730227.65
2019	17878676108478.438
2020	17547047723479.094
2021	18700376244791.65