Year	current US$
2005	293000000
2006	173000000
2007	115000000
2008	150000000
2009	115000000
2010	104000000
2011	91000000
2012	78000000
2013	76000000
2014	58000000
2015	36000000
2016	37000000
2017	30000000
2018	28000000
2019	28000000
2020	7000000