Year	constant 2010 US$
2008	3182805389.32243
2009	3172212236.79074
2010	3141869968.16392
2011	2721883020.16366
2012	3140437207.72795
2013	3533231201.42815
2014	3680561818.33197
2015	4034851827.09652
2016	4044751967.87765
2017	4264548113.39301
2018	4685346010.6227