Year	current US$
1995	35000000
1996	29000000
1997	16000000
1998	20000000
1999	26000000
2000	12000000
2001	17000000
2002	20000000
2003	21000000
2004	29000000
2005	27000000
2006	34000000
2007	72000000
2008	64000000
2009	53000000
2010	57000000
2011	53000000
2012	43000000
2013	39000000
2014	54000000
2015	62000000
2016	64000000
2017	50000000
2018	31000000
2019	94000000