Year	current US$
1995	815000000
1996	781000000
1997	801000000
1998	920000000
1999	788000000
2000	785000000
2001	795000000
2002	840000000
2003	1060000000
2004	1224000000
2005	1364000000
2006	2067000000
2007	2772000000
2008	3096000000
2009	2656000000
2010	2980000000
2011	3527000000
2012	3581000000
2013	3931000000
2014	3926000000
2015	3132000000
2016	3130000000
2017	3835000000
2018	4309000000
2019	4148000000
2020	1687000000