Year	constant 2015 US$
2009	1257551799.4747612
2010	1297793365.1585035
2011	1357491904.264458
2012	1376368434.1965997
2013	1394353867.6766403
2014	1416389988.22102
2015	1417888715.083799
2016	1431610451.7030313
2017	1323735540.537673
2018	1232967219.6602464
2019	1368162086.8271852
2020	1185966832.347759
2021	1240255611.869273
2022	1361800675.6173792
2023	1408101898.58837