Year	current US$
1995	6000000
1996	8000000
1997	5000000
1998	5000000
1999	11000000
2000	17000000
2001	21000000
2002	13000000
2003	25000000
2004	30000000
2005	24000000
2006	23000000
2007	19000000
2008	22000000
2009	21000000
2010	18000000
2011	18000000
2012	19000000
2013	22000000
2014	21000000
2015	15000000
2018	13000000
2019	10000000
2020	4000000