Year	current US$
1995	9000000
1996	4000000
1997	4000000
1998	14000000
1999	14000000
2000	16000000
2001	19000000
2002	31000000
2003	30000000
2004	37000000
2005	48000000
2006	35000000
2007	51000000
2008	59000000
2009	53000000
2010	62000000
2011	69000000
2012	71000000
2013	77000000
2014	77000000
2015	61000000
2016	52000000
2017	55000000
2018	53000000
2019	54000000
2020	23000000