Year	current US$
1995	177000000
1996	161000000
1997	146000000
1998	189000000
1999	173000000
2000	158000000
2001	144000000
2002	103000000
2003	199000000
2004	230000000
2005	131000000
2006	128000000
2007	200000000
2008	335000000
2009	413000000
2010	344000000
2011	383000000
2012	351000000
2013	436000000
2014	487000000
2015	483000000
2016	446000000
2017	629000000
2018	644000000
2019	705000000
2020	197000000