Year	current US$
2009	469999.998807907
2013	268433.98809433
2014	258539.25943374602
2015	249750.64396858198
2016	295868.48616599996
2017	291333.73498916597
2018	513719.975948334
2019	739561.915397644
2020	919650.018215179
2021	796455.323696136