Year	current US$
2007	2000000
2008	5000000
2009	17000000
2010	53000000
2011	87000000
2012	133000000
2013	195000000
2014	185000000
2015	105000000
2016	71000000
2017	21000000
2018	11000000
2019	3000000
2020	1000000