Year	current US$
1998	72000000
1999	59000000
2000	69000000
2001	58000000
2002	72000000
2003	83000000
2004	93000000
2005	104000000
2006	109000000
2007	142000000
2008	188000000
2009	214000000
2010	242000000
2011	249000000
2012	268000000
2013	314000000
2014	284000000
2015	254000000
2016	275000000
2017	289000000
2018	325000000
2019	295000000
2020	67000000