Year	current US$
1998	483330436.632147
1999	532355600.252353
2000	612665408.114645
2001	686129496.869234
2002	627002404.454589
2003	728525181.838009
2004	751893967.119874
2005	873113790.438776
2006	1072903266.32196
2007	1370602786.40363
2008	1701191936.64867
2009	1730653987.365
2010	1716074810.60494
2011	1777630381.2492
2012	2099053710.26118
2013	1983036991.30633
2014	2133062790.01213
2015	2050494583.17121
2016	1382373258.81607
2017	1415251054.18733