Year	current US$
1995	33000000
1996	59000000
1997	61000000
1998	47000000
1999	31000000
2000	47000000
2001	50000000
2002	58000000
2003	74000000
2004	85000000
2005	100000000
2006	135000000
2007	200000000
2008	243000000
2009	222000000
2010	231000000
2011	315000000
2012	225000000
2013	257000000
2014	239000000
2015	201000000
2016	180000000
2017	221000000
2018	396000000
2019	459000000
2020	130000000