Year	current US$
2000	23000000
2001	25000000
2002	37000000
2003	38000000
2004	52000000
2005	46000000
2006	55000000
2007	61000000
2008	82000000
2009	99000000
2010	105000000
2011	116000000
2012	128000000
2013	200000000
2014	183000000
2015	152000000
2016	172000000
2017	172000000
2018	179000000
2019	173000000