Year	current US$
1995	7000000
1996	12000000
1997	5000000
1998	5000000
1999	12000000
2000	272000000
2001	257000000
2002	365000000
2003	489000000
2004	642000000
2005	786000000
2006	965000000
2007	1268000000
2008	1555000000
2009	1585000000
2010	1360000000
2011	1565000000
2012	1284000000
2013	1479000000
2014	1590000000
2015	1238000000
2016	1262000000
2017	1433000000
2018	1679000000
2019	1770000000
2020	763000000