Year	constant 2011 international $
1990	6285.05939671411
1991	6068.50772393811
1992	6808.00888087667
1993	6743.71257713472
1994	6744.78906574748
1995	6883.47559015309
1996	6813.335711521
1997	6870.76868291753
1998	6939.87741280927
1999	7051.28559640558
2000	7220.4337409273
2001	7462.67914381551
2002	7745.64424071993
2003	7894.94035209882
2004	8346.73690842211
2005	8736.46158387111
2006	9087.47344593587
2007	9415.96106431731
2008	9633.1175672697
2009	9664.26551990683
2010	9386.17904454746
2011	9124.36553391176
2012	8871.10052745088
2013	8662.1650706166
2014	8530.28272378504
2015	8407.67967196157
2016	8320.34608260813
2017	8298.54589266162
2018	8309.30375978814