Year	current US$
1997	424000000
1998	521000000
1999	403000000
2000	369000000
2001	363000000
2002	361000000
2003	375000000
2004	470000000
2005	577000000
2006	571000000
2007	616000000
2008	746000000
2009	806000000
2010	861000000
2011	928000000
2012	1003000000
2013	1101000000
2014	1185000000
2015	1288000000
2016	992000000
2017	873000000
2018	818000000
2019	738200012.207031