Year	constant 2011 international $
1990	1371.23404009009
1991	1359.83722973541
1992	1337.73517800845
1993	1309.27112401067
1994	1289.43898893701
1995	1327.90324242075
1996	1369.75987605994
1997	1399.50942840314
1998	1420.28925584851
1999	1447.23159323282
2000	1478.09966551764
2001	1521.16839580819
2002	1557.63592636444
2003	1603.52924551951
2004	1671.36148419726
2005	1763.5402647066
2006	1854.69373442889
2007	1959.92801545359
2008	2049.18854074711
2009	2102.79232748727
2010	2187.16247261909
2011	2218.38046011229
2012	2275.24039608157
2013	2354.80273822103
2014	2428.65298736116
2015	2471.7349393361
2016	2513.51923062463
2017	2584.39532348568
2018	2644.61424642193