Year	current US$
2008	4036115
2009	4979556
2010	2641724
2011	11613670
2012	45637428
2013	16742192
2014	18069889
2015	29358261
2016	182880842
2017	36182973
2018	25098581
2019	21434893
2020	10714775
2021	9190571
2022	11237469