Year	current US$
1995	121000000
1996	184000000
1997	188000000
1998	207000000
1999	92000000
2000	98000000
2001	106000000
2002	117000000
2003	118000000
2004	178000000
2005	165000000
2006	205000000
2007	223000000
2008	257000000
2009	355000000
2010	289000000
2011	320000000
2012	426000000
2013	297000000
2014	369000000
2015	500000000
2016	600000000
2017	313000000
2018	458000000
2019	700000000
2020	397000000