Year	current US$
1995	137000000
1996	140000000
1997	128000000
1998	111000000
1999	81000000
2000	73000000
2001	69000000
2002	62000000
2003	64000000
2004	70000000
2005	78000000
2006	92000000
2007	102000000
2008	109000000
2009	205000000
2010	217000000
2011	241000000
2012	265000000
2013	273000000
2014	288000000
2015	318000000
2016	326000000
2017	369000000
2018	363000000
2019	379000000
2020	81000000