Year	current US$
1996	67000000
1997	76000000
2003	58000000
2004	51000000
2005	59000000
2006	69000000
2007	87000000
2008	80199996.9482422
2009	64000000
2010	80000000
2011	86000000
2012	104000000
2013	78000000
2014	110000000
2015	92000000
2016	88000000
2017	128000000
2018	174000000
2019	157000000
2020	53000000