Year	current US$
2008	2124185
2009	3758510
2010	1799982
2011	22798634
2012	1661438
2013	10904212
2014	9982917
2015	1894041
2016	2978941
2017	1071740
2018	1169092
2019	4008678
2020	1317536
2021	4624983
2022	2421297