Year	constant 2015 US$
2000	8392339366.083944
2001	8130381662.544644
2002	9683466356.787216
2003	9724688834.324501
2004	9820558947.62405
2005	10663920702.591246
2006	10944846316.40277
2007	11431048727.139828
2008	13465489405.706287
2009	11692672194.37477
2010	13716222340.024286
2011	19389521517.143845
2012	24760643222.099888
2013	25527771246.648468
2014	23642093576.54595
2015	22301861702.12766
2016	21598600664.736507
2017	23240564362.91251
2018	24570936266.352287
2019	23202879219.596325
2020	23040096112.28565
2021	26538780361.27574