Year	current US$
1995	660000000
1996	744000000
1997	774000000
1998	853000000
1999	795000000
2000	723000000
2001	700000000
2002	1048000000
2003	1062000000
2004	1330000000
2005	1441000000
2006	2060000000
2007	2311000000
2008	2943000000
2009	2911000000
2010	3585000000
2011	3425000000
2012	4061000000
2013	4117000000
2014	4375000000
2015	4065000000
2016	4044000000
2017	4639000000
2018	5249000000
2019	5786000000
2020	1409000000