Year	current US$
2007	3416666
2008	4747147
2009	6979502
2010	11226657
2011	696891
2012	1128720
2013	376541
2014	1101491
2015	5860647
2016	4340427
2017	4292150
2018	6243919
2019	6637323
2020	11992939
2021	14531924