Year	constant 2010 US$
1998	749.473511934513
1999	774.052831326871
2000	727.843353432367
2001	692.492188413822
2002	732.385915214787
2003	743.888800936741
2004	821.808554405375
2005	856.292596528539
2006	842.924663639424
2007	996.858411353283
2008	1012.92011858471
2009	1103.35530359679
2010	1177.69467421721
2011	1199.79778480921
2012	1341.32963557834
2013	1458.92704014996
2014	1466.67984542137
2015	1488.35685334722
2016	1622.79017583758
2017	1686.07694493941