Year	current US$
1995	3278000000
1996	3584000000
1997	3962000000
1998	4230000000
1999	4195000000
2000	4425000000
2001	3893000000
2002	2328000000
2003	2511000000
2004	2604000000
2005	2790000000
2006	3108000000
2007	3935000000
2008	4586000000
2009	4536000000
2010	4951000000
2011	5667000000
2012	6117000000
2013	5932000000
2014	5983000000
2015	6982000000
2016	9679000000
2017	11378000000
2018	10670000000
2019	7850000000
2020	2346000000