Year	constant 2010 US$
1991	2745.20998984347
1992	2361.39323112364
1993	2007.81244090718
1994	1716.84984301638
1995	1744.00562181987
1996	1628.17533071577
1997	1603.49336899623
1998	1662.13730394458
1999	1752.11680303791
2000	1767.9715964254
2001	1789.14577339784
2002	1812.88198750834
2003	1731.34527570371
2004	1790.59821202105
2005	1837.40300180397
2006	1936.1575528466
2007	2116.93445677167
2008	2335.93715879
2009	2351.65559317907
2010	2260.649260081
2011	2339.55730928186
2012	2439.94204756022
2013	2579.38967330169
2014	2662.93121436293
2015	2603.94185721198
2016	2605.78869657858
2017	2634.48319261942
2018	2651.71870648807