Year	current US$
1995	186000000
1996	176000000
1997	180000000
1998	202000000
1999	218000000
2000	240000000
2001	250000000
2002	263000000
2003	279000000
2004	296000000
2005	314000000
2006	373000000
2007	393000000
2008	428000000
2009	411000000
2010	453000000
2011	501000000
2012	710000000
2013	1188000000
2014	1263000000
2015	1420000000
2016	1542000000
2017	1599000000
2018	1660000000
2019	1638000000
2020	449000000