Year	current US$
1998	380499660.3980537
1999	394987984.57551485
2000	360463100.9233842
2001	351763074.4868774
2002	401789866.40072757
2003	529802241.1349352
2004	639455019.6872648
2005	667389812.0309896
2006	685971320.48183
2007	846592105.0564349
2008	975111900.8600943
2009	910727470.3038478
2010	970926702.188509
2011	1095351577.248415
2012	1051685699.3666835
2013	1068467043.6147285
2014	1107561775.9931092
2015	927605765.9037942
2016	967564054.5770316
2017	1008509853.3245429
2019	975711043.3246288