Year	current US$
1995	6000000
1996	3000000
1997	3000000
1998	3000000
1999	7000000
2000	20000000
2001	18000000
2002	20000000
2003	18000000
2004	19000000
2005	20000000
2006	20000000
2007	30000000
2008	25000000
2009	21000000
2010	25000000
2011	25000000
2012	23000000
2013	25000000
2014	28000000
2015	24000000
2016	39000000
2017	42000000
2018	33000000
2019	42000000
2020	13000000