Year	constant 2015 US$
2007	3903142716.5241632
2008	3590525074.8002105
2009	2928916144.90172
2010	2869189058.322351
2011	3126624245.991996
2012	2946829295.0005035
2013	3108113990.8899193
2014	3227468646.548109
2015	3029611269.2070103
2016	3026476467.9397235
2017	3212839573.967436
2018	3336921310.9016933
2019	3422224395.122103