Year	current US$
2009	310482
2010	964226
2011	1619723
2012	7237726
2013	18922393
2014	47086511
2015	22835702
2016	21521243
2017	14797111
2018	11790579
2019	171028627
2020	334578591
2021	18783670
2022	18152069