Year	constant 2015 US$
2007	435.19713845060124
2008	424.0321608249525
2009	581.419842493048
2010	625.8513176620477
2011	581.8373669245319
2012	642.1479741017116
2013	656.2853190176446
2014	698.0847105481043
2015	598.2705844120036
2016	531.0904181157716
2017	457.0690949520136
2018	481.4611865112196
2019	478.6805060469813
2020	387.2171264119194
2021	414.06611222157375