Year	current US$
2000	33000000
2001	28000000
2002	33000000
2003	50000000
2004	21000000
2005	14000000
2006	92000000
2007	108000000
2008	102000000
2009	112000000
2010	151000000
2011	252000000
2012	123000000
2013	113000000
2014	100000000
2015	75000000
2016	71000000
2017	108000000
2018	108000000
2019	102000000
2020	37000000