Year	constant 2015 US$
2005	2734989054.810495
2006	3547782655.5871863
2007	4490141641.260866
2008	5934982262.786022
2009	6038295579.764753
2010	6107524792.267282
2011	6368986018.792471
2012	8686616283.164095
2013	5914171980.037248
2014	5346268622.371211
2015	3257009302.275342
2016	1840800159.0373778
2017	1626213848.018087
2018	1440146496.6209826
2019	1151526443.9222276