Year	constant 2011 international $
1990	1271.25641734781
1991	1397.27033943668
1992	1317.42146851237
1993	1328.21602049453
1994	1326.60681181608
1995	1295.08742386065
1996	1350.274246081
1997	1376.74000964292
1998	1445.00133290223
1999	1494.8227482171
2000	1456.83317116439
2001	1571.25260648427
2002	1550.63365343818
2003	1687.36642696388
2004	1661.06186608802
2005	1714.67167081186
2006	1726.41718018826
2007	1746.75213225327
2008	1777.92822591457
2009	1798.14824905514
2010	1803.86290217318
2011	1811.07230897312
2012	1733.81607298517
2013	1743.51794398299
2014	1813.07527824385
2015	1868.13817577173
2016	1904.34280051418
2017	1963.81821457747
2018	1965.38514237965