Year	constant 2015 US$
2009	3655.9270352518556
2010	3909.1514183282143
2011	4019.6997089197653
2012	3841.97814620435
2013	3770.7733838619715
2014	3789.564556570603
2015	3968.2990681618367
2016	4231.40584318457
2017	4216.476552523827
2018	4131.673277208682
2019	4240.168608754777
2020	4070.9087696741203
2021	3801.019234151512
2022	3496.6097483245685
2023	3776.5514383860796