Year	current US$
1996	5690000
1997	250000
1998	1510000
1999	560000
2000	1740000
2001	2310000
2002	9690000
2003	10780000
2004	15240000
2005	23560000
2006	17570000
2007	27140000
2008	25930000
2009	28930000
2010	5860000
2011	5120000
2012	4000000
2013	1450000
2014	1860000
2015	1150000
2016	150000
2017	190000
2018	170000
2019	120000
2020	110000
2021	6430000
2022	9250000