Year	current US$
1995	3491000000
1996	3506000000
1997	3740000000
1998	3598000000
1999	4800000000
2000	4611000000
2001	2854000000
2002	2426000000
2003	2473000000
2004	2908000000
2005	3750000000
2006	3736000000
2007	4325000000
2008	5401000000
2009	4937000000
2010	5638000000
2011	5886000000
2012	6183000000
2013	6600000000
2014	6616000000
2015	6605000000
2016	6616000000
2017	7602000000
2018	8048000000
2019	8459000000
2020	2661000000