Year	constant 2011 international $
1990	4341.1677727959
1991	4413.39105809317
1992	4509.59863921666
1993	4577.36849929846
1994	4619.40418692811
1995	4674.02041213591
1996	4840.77975827154
1997	4983.86410572445
1998	5105.97185207714
1999	5163.41024665282
2000	5287.94742340987
2001	5275.06585600068
2002	5295.85235262195
2003	5501.44221693696
2004	5758.75904767708
2005	6013.46737340461
2006	6319.70651806387
2007	6617.47492516371
2008	6732.96713208643
2009	6728.17364103028
2010	7033.38105582789
2011	7273.29348810605
2012	7447.58108204823
2013	7677.58251837667
2014	7937.74252875116
2015	8234.4393357061
2016	8574.30493188205
2017	8868.32473530125
2018	9165.27168299566