Year	constant 2015 US$
2010	6257.717933010536
2011	7439.727207528948
2012	7372.881709725311
2013	7340.183050269498
2014	7333.793487492542
2015	7291.839673922385
2016	7573.470742401011
2017	7644.395983354429
2018	7585.59997333579
2019	7498.87642850206