Year	current US$
1995	1222000000
1996	1278000000
1997	1392000000
1998	1780000000
1999	2388000000
2000	2452000000
2001	2303000000
2002	2487000000
2003	2600000000
2004	3011000000
2005	2527000000
2006	3223000000
2007	3956000000
2008	4337000000
2009	3755000000
2010	3692000000
2011	3740000000
2012	3911000000
2013	3958000000
2014	3629000000
2015	3605000000
2016	3673000000
2017	4681000000
2018	5017000000
2019	4561000000
2020	1162000000