Year	current US$
2008	97773
2009	255620
2010	164313
2011	858464
2012	685093
2013	939715
2014	531884
2015	1245120
2016	289271
2017	3202737
2018	337247
2019	198643
2020	915082
2021	1274941
2022	1239758