Year	constant 2010 US$
1997	171082253.888253
1998	177535891.616823
1999	189678067.181896
2000	100971316.490542
2001	117182638.477211
2002	116465257.958182
2003	145153085.394637
2004	182081544.96469
2005	212158835.128453
2006	244264429.905628
2007	315049959.864663
2008	418120461.891494
2009	385833188.438428
2010	445037624.671105
2011	468844782.818083
2012	495814104.103814
2013	556623577.234371
2014	566838166.170441
2015	544920522.915628
2016	545231591.8725
2017	593350174.307222
2018	649365493.297895