Year	constant 2015 US$
2007	3584.838337938608
2008	3854.1808828689877
2009	3823.4805453423237
2010	3891.4952610008727
2011	3990.4286465339437
2012	4376.367114558509
2013	4450.104467350947
2014	4300.614361918565
2015	4376.786819556755
2016	4863.368452787453
2017	4666.129784456198
2018	4670.638758856519
2019	4824.745054122024
2020	4132.274651146493
2021	4092.0914542677715