Year	current US$
1994	11000000
1995	14000000
1996	13000000
1997	14000000
1998	11000000
1999	7000000
2000	12000000
2001	17000000
2002	20000000
2003	8000000
2004	6000000
2005	13000000
2006	14000000
2007	11000000
2008	10000000
2009	6000000
2010	6000000
2011	6000000
2012	9000000
2013	7000000
2014	11000000
2015	6000000
2016	7000000
2017	6000000
2018	4000000
2019	4000000
2020	7000000
2021	2000000
2022	3000000
2023	2000000