Year	constant 2015 US$
1995	3903967374133.465
1996	4245392000511.8677
1997	4492285685012.878
1998	4625429763825.369
1999	4840378418498.38
2000	5210609913343.878
2001	5510219968386.444
2002	5885173058746.873
2003	6296720265102.305
2004	6884547655094.457
2005	7494627093621.391
2006	8334940103857.026
2007	9343678597702.793
2008	9846135394190.715
2009	10208783278841.205
2010	11009967468476.54
2011	11574739920426.326
2012	12386344053487.82
2013	12959030082432.898
2014	13671213426991.998
2015	14151582161538.713
2016	14777738334569.941
2017	15665317772229.057
2018	16255077942178.984
2019	16834237180234.684
2020	16648558914379.484
2021	17581171916931.059