Year	current US$
1995	3000000
1996	22000000
1997	41000000
1998	41000000
1999	37000000
2000	40000000
2001	40000000
2002	54000000
2003	67000000
2004	162000000
2005	207000000
2006	265000000
2007	379000000
2008	435000000
2009	443000000
2010	579000000
2011	687000000
2012	803000000
2013	930000000
2014	1024000000
2015	996000000
2016	981000000
2017	1163000000
2018	1282000000
2019	1489000000
2020	307000000