Year	current US$
1995	35000000
1996	21000000
1997	39000000
1998	50000000
1999	40000000
2000	36000000
2001	39000000
2002	34000000
2003	101000000
2004	71000000
2005	125000000
2006	109000000
2007	98000000
2008	153000000
2009	87000000
2010	79000000
2011	93000000
2012	150000000
2013	183000000
2014	200000000
2015	174000000
2016	203000000
2017	210000000
2018	227000000
2019	235000000
2020	144000000