Year	current US$
1995	6017000000
1996	6366000000
1997	6798000000
1998	7441000000
1999	7097000000
2000	6332000000
2001	6146000000
2002	7420000000
2003	6985000000
2004	8783000000
2005	11407000000
2006	12657000000
2007	13226000000
2008	13481000000
2009	12747000000
2010	14559000000
2011	14537000000
2012	13572000000
2013	14203000000
2014	15444000000
2015	13774000000
2016	14758000000
2017	15739000000
2018	16551000000
2019	16593000000