Year	constant 2011 international $
1990	1881.69875175927
1991	1859.04883868614
1992	1922.0900743206
1993	1976.91159154201
1994	2070.30726466381
1995	2188.18952745104
1996	2313.3834804008
1997	2364.32046406379
1998	2464.82107492429
1999	2637.06717384764
2000	2683.01146411144
2001	2769.37672526739
2002	2831.73749133605
2003	3002.24996358913
2004	3189.27473336952
2005	3387.26068188146
2006	3602.02396010508
2007	3833.2513936601
2008	3887.23796699782
2009	4133.86204599105
2010	4403.27232113567
2011	4583.89422573227
2012	4760.39161445708
2013	5001.38664668051
2014	5314.99433362026
2015	5674.21422773606
2016	6075.41401038721
2017	6445.8880987804
2018	6828.60152847081