Year	current US$
1995	735000000
1996	865000000
1997	1011000000
1998	1052000000
1999	1033000000
2000	1035000000
2001	995000000
2002	416000000
2003	486000000
2004	604000000
2005	764000000
2006	939000000
2007	1142000000
2008	1401000000
2009	1272000000
2010	1497000000
2011	1935000000
2012	2349000000
2013	2489000000
2014	1854000000
2015	2366000000
2016	2594000000
2017	2802000000
2018	2414000000
2019	1995000000
2020	400000000