Year	constant 2011 international $
1990	1676.19028831897
1991	1659.07794720804
1992	1791.25321694974
1993	1892.47092844877
1994	2193.45386179151
1995	2441.12393322081
1996	2654.5474450433
1997	2886.02174474452
1998	3182.29070892905
1999	3472.60473563799
2000	3896.96062789052
2001	3915.15868013561
2002	4053.36763031147
2003	4157.1480246928
2004	4513.96743524271
2005	4759.13261124538
2006	5071.85682463518
2007	5768.86952013302
2008	6078.54680585444
2009	5929.44377473058
2010	5943.35034723677
2011	6102.41216353509
2012	6090.55379800137
2013	6061.31205669713
2014	6021.6283629113
2015	6007.2182902507
2016	6214.08023407487
2017	6387.09570633917
2018	6661.98616585498