Year	constant 2015 US$
2000	1819957760.0022888
2001	1569913763.2959833
2002	1497886119.938641
2003	1374070853.1906645
2004	1435629227.3998373
2005	1603023595.3374517
2006	1833506327.8999386
2007	1982790413.1339443
2008	2252093007.0247893
2009	2378120131.666809
2010	2751651460.80316
2011	3368681784.3842764
2012	3594754018.920282
2013	4290770292.0668044
2014	4592583074.303731
2015	4898081700.518005
2016	5410323084.696257