Year	current US$
2009	479187885.578538
2010	4353196511.35543
2011	12651715026.5631
2012	15143751868.8931
2013	15242529659.5985
2014	13078962297.8278
2015	13388774474.634
2016	9034882862.01398
2017	8815828974.08084
2018	10800759653.7115
2019	13638404261.1843