Year	constant 2015 US$
2007	3208.151015426243
2008	4060.5653451718235
2009	3332.149053367513
2010	3713.8738209293624
2011	4156.454614946558
2012	4544.590925764977
2013	4587.4362031601595
2014	4250.070869557241
2015	3486.5344089055693
2016	3338.2596141552613
2017	3477.8423777170515
2018	3812.9960920571857
2019	3999.978016014041
2020	3149.9414654516936
2021	3733.6618237935604