Year	constant 2011 international $
1990	1428.07830045721
1991	1393.25940730793
1992	1315.83087755138
1993	1280.8673207387
1994	1254.1496861808
1995	1270.64289867886
1996	1299.21356177548
1997	1312.13436261754
1998	1320.14680857685
1999	1332.41763085637
2000	1338.95054015004
2001	1369.10837535882
2002	1377.8921096723
2003	1401.11434367275
2004	1446.30198585803
2005	1499.99653438895
2006	1540.80823637268
2007	1595.09882251603
2008	1645.35231119563
2009	1687.26646869381
2010	1759.47081085107
2011	1768.49657664138
2012	1786.25138616132
2013	1850.83807425787
2014	1908.61748003556
2015	1908.30277048673
2016	1916.88404630891
2017	1962.65082027707
2018	2006.06428594441