Year	current US$
1995	177000000
1996	170000000
1997	157000000
1998	152000000
1999	176000000
2000	205000000
2001	218000000
2002	261000000
2003	336000000
2004	458000000
2005	533000000
2006	639000000
2007	790000000
2008	1184000000
2009	1119000000
2010	1434000000
2011	1998000000
2012	1980000000
2013	2236000000
2014	2107000000
2015	2279000000
2016	2138000000
2017	2505000000
2018	3548000000
2019	3529000000
2020	2282000000