Year	current US$
1995	4663000000
1996	5015000000
1997	4358000000
1998	3222000000
1999	4217000000
2000	4535000000
2001	6600000000
2002	8212000000
2003	8382000000
2004	9291000000
2005	10070000000
2006	11268000000
2007	13503000000
2008	16340000000
2009	15704000000
2010	18700000000
2011	21420000000
2012	23139000000
2013	24407000000
2014	25547000000
2015	23658000000
2016	23965000000
2017	24999000000
2018	26514000000
2019	27324000000
2020	6828000000