Year	constant 2011 international $
1990	13579.6113708199
1991	13892.2149196259
1992	14126.0368488463
1993	14148.3454574254
1994	14595.3001354517
1995	13452.2338474471
1996	14134.5909882244
1997	14868.6799522997
1998	15401.2118183142
1999	15593.3938542284
2000	16129.9603347501
2001	15840.7656931996
2002	15618.5304802018
2003	15629.8167919413
2004	16019.7546166847
2005	16159.0489137035
2006	16641.3057651751
2007	16771.535314442
2008	16711.5547714836
2009	15596.1976893413
2010	16160.3417046123
2011	16520.2585085371
2012	16891.4926915682
2013	16896.4671376372
2014	17149.7771030418
2015	17495.1611140392
2016	17790.9395976937
2017	17949.0199504177
2018	18101.9041221786