Year	constant 2011 international $
1990	2850.84618149599
1991	2173.61850007475
1992	2265.42051781337
1993	2363.54873003686
1994	2374.85020770942
1995	2398.01505187369
1996	2509.99610422993
1997	2660.83215944006
1998	2938.86372674038
1999	3098.10416867439
2000	3096.30207026585
2001	3115.04559868593
2002	3021.21819775955
2003	2783.49358000617
2004	3132.60672304276
2005	3266.6850333374
2006	3419.49285916031
2007	3522.34285700801
2008	3638.94418824279
2009	3723.42321927785
2010	3879.93105748036
2011	3596.13834089535
2012	3947.52454842763
2013	4020.53922612951
2014	3974.38509094162
2015	3964.13435904884
2016	4090.40125746054
2017	4119.19759865701
2018	4129.49097339299