Year	constant 2010 US$
1997	3056198553.16793
1998	3205952373.5988
1999	2904592929.72307
2000	2994635235.51695
2001	3027571513.10566
2002	3085214474.11069
2003	3161809840.05016
2004	3301753218.00368
2005	3439786363.46066
2006	3734452893.54152
2007	3988772862.24909
2008	4276873549.04168
2009	4029024755.40531
2010	4139192052.98013
2011	4272823814.83923
2012	4156441979.12349
2013	4303954683.46629
2014	4380723550.42906
2015	4529248516.19843
2016	4662831394.83271
2017	4882752203.81173
2018	5119782657.8488