Year	current US$
1995	3000000
1996	8000000
1997	11000000
1998	11000000
1999	13000000
2000	23000000
2001	23000000
2002	10000000
2003	6000000
2004	14000000
2005	17000000
2006	18000000
2007	22000000
2008	30000000
2009	32000000
2010	39000000
2011	42000000
2012	51000000
2013	70000000
2014	87000000
2015	116000000
2016	111000000
2017	93000000
2018	94000000
2019	87000000
2020	60000000