Year	current US$
1995	1075000000
1996	1255000000
1997	1184000000
1998	856000000
1999	815000000
2000	862000000
2001	764000000
2002	966000000
2003	898000000
2004	980000000
2005	1543000000
2006	1853000000
2007	3898000000
2008	3260000000
2009	1433000000
2010	1467000000
2011	1689000000
2012	1460000000
2013	1783000000
2014	1869000000
2015	1528000000
2016	1597000000
2017	1926000000
2018	2167000000
2019	2372000000
2020	382000000