Year	current US$
1995	43000000
1996	42000000
1997	38000000
1998	58000000
1999	34000000
2000	31000000
2001	30000000
2002	26000000
2003	22000000
2004	48000000
2005	49000000
2006	49000000
2007	51000000
2008	46000000
2009	72000000
2010	61000000
2011	30000000
2012	44000000
2013	38000000
2014	54000000
2015	50000000
2016	30000000
2017	65000000
2018	41000000
2019	32000000
2020	36000000