Year	constant 2015 US$
2007	12565476616.896156
2008	12954497653.181883
2009	11521787489.353653
2010	11379532078.400408
2011	11814705757.94673
2012	11698449845.99065
2013	11618119872.186905
2014	11519809266.603868
2015	11508116557.136393
2016	11489941635.62275
2017	11624655072.342443
2018	11739586281.564293
2019	11859710325.504328