Year	current US$
1995	394000000
1996	368000000
1997	501000000
1998	534000000
1999	525000000
2000	559000000
2001	585000000
2002	607000000
2003	518000000
2004	523000000
2005	356000000
2006	509000000
2007	481000000
2008	518000000
2009	458000000
2010	465000000
2011	472000000
2012	489000000
2013	500000000
2014	565000000
2015	680000000
2016	708000000
2017	832000000
2018	911000000
2019	964000000