Year	current US$
1995	57000000
1996	29000000
1997	10000000
1998	6000000
1999	6000000
2000	10000000
2001	14000000
2002	38000000
2003	60000000
2004	58000000
2005	64000000
2006	23000000
2007	22000000
2008	34000000
2009	25000000
2010	26000000
2011	44000000
2012	47000000
2013	66000000
2014	35000000
2015	37000000
2016	41000000
2017	39000000
2018	39000000