Year	constant 2010 US$
1997	2561253199.76193
1998	2341630634.34078
1999	2585373181.16965
2000	2803201950.42042
2001	3084109402.61671
2002	2997666243.39495
2003	3330450908.7643
2004	3491219753.68377
2005	3594730280.53469
2006	3846887355.74099
2007	4258253470.73697
2008	4082511412.58089
2009	4029073625.52984
2010	3621113818.48663
2011	3798411585.22655
2012	4187104103.78274
2013	4082368754.87737
2014	4293739998.44687
2015	4436904604.05849
2016	5013685987.21591
2017	5475632016.43797