Year	current US$
1995	36764000000
1996	37058000000
1997	33009000000
1998	28806000000
1999	32772000000
2000	31884000000
2001	26531000000
2002	26656000000
2003	28958000000
2004	38252000000
2005	37565000000
2006	26876000000
2007	26511000000
2008	27901000000
2009	25199000000
2010	27950000000
2011	27262000000
2012	27906000000
2013	21861000000
2014	19314000000
2015	15974000000
2016	18562000000
2017	18188000000
2018	20198000000
2019	21277000000
2020	5448000000