Year	constant 2011 international $
1990	3285.58894116357
1991	3170.60250296744
1992	3051.75890786472
1993	2940.49180163041
1994	2864.25132148967
1995	2968.0161908719
1996	3095.96078588561
1997	3113.03812313171
1998	3170.40754537518
1999	3132.63849844422
2000	2989.1467200384
2001	2922.03395188208
2002	2810.18903124562
2003	2714.01137923021
2004	2690.73876215617
2005	2679.7873860311
2006	2662.33025390381
2007	2650.48596315702
2008	2657.67298101952
2009	2682.03663792349
2010	2673.01308258126
2011	2495.49512456671
2012	2696.19163882678
2013	2864.04862737733
2014	3038.8448270952
2015	3225.18885921985
2016	3395.0889323301
2017	3564.59584591917
2018	3733.047670155