Year	constant 2011 international $
1990	1445.26369329793
1991	1434.50530976374
1992	1432.74243740481
1993	1429.44924859648
1994	1388.02076109813
1995	1357.62566246577
1996	1345.47140809748
1997	1368.56465262672
1998	1373.44964157493
1999	1416.71577989566
2000	1448.61768608087
2001	1484.89056950709
2002	1391.42603532296
2003	1440.18482047273
2004	1493.70860246683
2005	1434.38909953861
2006	1407.03353839466
2007	1415.08421064079
2008	1452.44686291152
2009	1500.82039995936
2010	1551.58893699578
2011	1440.79435802955
2012	1476.05982436262
2013	1500.51121844347
2014	1442.09738909656
2015	1481.47620017438
2016	1443.68768040397
2017	1465.33555117782
2018	1516.68998449738