Year	constant 2015 US$
2011	479.98541340018954
2012	506.93196885934054
2013	545.3556176539116
2014	584.9461765436431
2015	627.7509392005462
2016	669.026975291839
2017	711.4603577708823
2018	741.0401154267495
2019	780.6624184590913
2020	806.5736199949687
2021	830.5962493913892
2022	853.4311522215385
2023	888.000709342306