Year	current US$
2001	8304000000
2002	7598000000
2003	8848000000
2004	10089000000
2005	10881000000
2006	11625000000
2007	12369000000
2009	12718000000
2010	12680000000
2011	14114000000
2012	13704000000
2013	14534000000
2014	15249000000
2015	8975000000
2016	8784000000
2017	9636000000
2018	10319000000
2019	10581000000
2020	7447000000