Year	current US$
1995	308000000
1996	307000000
1997	315000000
1998	323000000
1999	291000000
2000	295000000
2001	310000000
2002	308000000
2003	352000000
2004	462000000
2005	657000000
2006	724000000
2007	798000000
2008	956000000
2009	751000000
2010	832000000
2011	615000000
2012	704000000
2013	672000000
2014	683000000
2015	488000000
2016	470000000
2017	477000000
2018	579000000
2019	567000000
2020	155000000