Year	current US$
1995	21000000
1996	14000000
1997	9000000
1998	2000000
1999	9000000
2000	16000000
2001	14000000
2002	3000000
2003	4000000
2004	17000000
2005	45000000
2006	95000000
2007	67000000
2008	77000000
2009	64000000
2010	61000000
2011	61000000
2012	71000000
2013	84000000
2014	95000000
2015	88000000
2016	65000000
2017	46000000
2018	56000000
2019	53000000
2020	15000000