Year	current US$
1995	32000000
1996	45000000
1997	28000000
1998	74000000
1999	80000000
2000	102000000
2001	100000000
2002	111000000
2003	112000000
2004	178000000
2005	184000000
2006	220000000
2007	219000000
2008	323000000
2009	246000000
2010	220000000
2011	209000000
2012	217000000
2013	250000000
2014	258000000
2015	311000000
2016	209000000
2017	141000000
2018	168500000
2019	112000000
2020	43000000