Year	current US$
1995	148000000
1996	157000000
1997	181000000
1998	198000000
1999	227000000
2000	209000000
2001	206000000
2002	258000000
2003	252000000
2004	286000000
2005	249000000
2006	273000000
2007	298000000
2008	268000000
2009	216000000
2010	193000000
2011	159000000
2012	184000000
2013	178000000
2014	198000000
2015	235000000
2016	256000000
2017	271000000
2018	286000000
2019	284000000
2020	131000000