Year	current US$
1995	14000000
1996	14000000
1997	11000000
1998	10000000
1999	5000000
2000	3000000
2001	12000000
2002	8000000
2003	13000000
2004	10000000
2005	30000000
2006	30000000
2007	22000000
2008	25000000
2009	28000000
2010	29000000
2011	31000000
2012	31000000
2013	28000000
2014	32000000
2015	35000000
2016	28000000
2017	34000000
2018	49000000
2019	56000000
2020	36000000