Year	current US$
1998	132000000
1999	144000000
2000	156000000
2001	153000000
2002	146000000
2003	161000000
2004	190000000
2005	198000000
2006	205000000
2007	257000000
2008	309000000
2009	403000000
2010	289000000
2011	520000000
2012	627000000
2013	593000000
2014	596000000
2015	707000000
2016	707000000
2017	882000000
2018	1116000000
2019	1266000000
2020	228000000