Year	current US$
1995	72000000
1996	73000000
1997	153000000
1998	179000000
1999	169000000
2000	165000000
2001	195000000
2002	191000000
2003	229000000
2004	292000000
2005	206000000
2006	224000000
2007	278000000
2008	241000000
2009	187000000
2010	219000000
2011	203000000
2012	261000000
2013	242000000
2014	248000000
2015	294000000
2016	412000000
2017	418000000
2018	443000000
2019	471000000
2020	142000000