Year	current US$
2007	861000000
2008	876000000
2009	893000000
2010	941000000
2011	931000000
2012	963000000
2013	988000000
2014	1019000000
2015	1020000000
2016	1013000000
2017	1513000000
2018	1288000000
2019	1275000000
2020	536000000