Year	current US$
1995	2238000000
1996	2256000000
1997	2135000000
1998	2116000000
1999	2277000000
2000	2050000000
2001	1958000000
2002	2179000000
2003	2500000000
2004	2980000000
2005	3494000000
2006	3791000000
2007	4503000000
2008	4853000000
2009	4199000000
2010	4692000000
2011	5329000000
2012	5436000000
2013	5627000000
2014	5579000000
2015	4864000000
2016	5226000000
2017	5601000000
2018	5928000000
2019	5861000000
2020	1792000000