Year	current US$
1995	48000000
1996	38000000
1997	40000000
1998	47000000
1999	12000000
2000	21000000
2001	21000000
2002	43000000
2003	70000000
2004	75000000
2005	77000000
2006	75000000
2007	32000000
2008	26000000
2009	40000000
2010	51000000
2011	10000000
2012	29000000
2013	4000000
2014	15000000
2015	14000000
2016	13000000
2017	13000000
2018	16000000
2019	14000000
2020	7000000