Year	current US$
1995	367000000
1996	282000000
1997	351000000
1998	369000000
1999	414000000
2000	388000000
2001	347000000
2002	594000000
2003	709000000
2004	808000000
2005	729000000
2006	733000000
2007	750000000
2008	803000000
2009	754000000
2010	1044000000
2011	1421000000
2012	1756000000
2013	2506000000
2014	3278000000
2015	3978000000
2016	4591000000
2017	5083000000
2018	5608000000
2019	4663000000
2020	1076000000