Year	current US$
1996	193000000
1997	192000000
1998	206000000
1999	206000000
2000	221000000
2001	385000000
2002	393000000
2003	385000000
2004	411000000
2005	429000000
2006	544000000
2007	648000000
2008	796000000
2009	689000000
2010	783000000
2011	995000000
2012	1096000000
2013	1295000000
2014	1375000000
2015	1540000000
2016	1617000000
2017	1747000000
2018	1758000000
2019	1811000000
2020	441000000