Year	constant 2011 international $
1990	2323.34584980778
1991	2312.31261572292
1992	2272.31022007436
1993	2235.6488081816
1994	2173.36145707982
1995	2229.56044456219
1996	2217.59321725089
1997	2232.26842342752
1998	2309.09191595259
1999	2398.95004044855
2000	2417.82539580961
2001	2468.52693100543
2002	2424.8683898118
2003	2523.67034161575
2004	2605.4379204953
2005	2682.44330381118
2006	2677.92765672544
2007	2736.88419115997
2008	2772.55254556612
2009	2754.75497425695
2010	2775.70191360732
2011	2739.33565520208
2012	2800.41159668239
2013	2799.96241985494
2014	2902.50733244818
2015	3001.81910716769
2016	3104.24448348912
2017	3232.31016489661
2018	3356.335910229