Year	current US$
1995	275000000
1996	278000000
1997	298000000
1998	326000000
1999	332000000
2000	360000000
2001	385000000
2002	323000000
2003	426000000
2004	476000000
2005	607000000
2006	704000000
2007	771000000
2008	887000000
2009	767000000
2010	810000000
2011	910000000
2012	1008000000
2013	990000000
2014	943000000
2015	931000000
2016	1079000000
2017	984000000
2018	1040000000
2019	1000000000
2020	628000000