Year	current US$
1995	4000000
1996	6000000
1997	19000000
1998	20000000
1999	21000000
2000	27000000
2001	29000000
2005	67000000
2006	148000000
2007	177000000
2008	224000000
2009	223000000
2010	224000000
2011	298000000
2012	337000000
2013	364000000
2014	376000000
2015	427000000
2016	443000000
2017	496500000
2018	547000000
2019	635900024.414063
2020	212000000