Year	current US$
1995	1155000000
1996	1137000000
1997	1235000000
1998	1242000000
1999	1172000000
2000	1333000000
2001	1456000000
2002	1319000000
2003	1420000000
2004	1584000000
2005	1663000000
2006	1752000000
2007	1743000000
2008	1761000000
2009	1388000000
2010	1182000000
2011	1202000000
2012	1162000000
2013	1142000000
2014	1094000000
2015	983000000
2016	1059000000
2017	1072000000
2018	893000000