Year	current US$
1995	24000000
1996	30000000
1997	30000000
1998	38000000
1999	34000000
2000	44000000
2001	39000000
2002	44000000
2003	62000000
2004	71000000
2005	77000000
2006	15000000
2007	6000000
2008	5000000
2009	3000000
2010	2000000
2011	7000000
2012	7000000
2013	5000000
2014	3000000
2015	12000000
2016	1000000
2017	6000000
2018	10000000
2019	7000000
2020	4000000