Year	current US$
2007	161000000
2008	197000000
2009	145000000
2010	149000000
2011	158000000
2012	157000000
2013	173000000
2014	181000000
2015	152000000
2016	149000000
2017	168000000
2018	194000000
2019	194000000
2020	64000000