Year	constant 2011 international $
1990	8269.84808468578
1991	8988.84577802076
1992	9082.20073005038
1993	9371.43252461458
1994	8495.32183687459
1995	9249.06880131875
1996	9131.03720230893
1997	9896.87989723872
1998	10222.7805753532
1999	10224.9432181012
2000	10055.9789849654
2001	10282.7015151406
2002	9662.75956965349
2003	10319.4703597171
2004	10265.9756600193
2005	10724.7361227638
2006	11467.8059791201
2007	12293.3272787216
2008	12833.8786390157
2009	12127.7120307326
2010	12673.2287471958
2011	14035.6420428388
2012	14576.3295256497
2013	15325.8936339278
2014	15817.3027754427
2015	15413.5097171058
2016	15353.1706397415
2017	15595.9211328914
2018	15951.3303986716