Year	constant 2011 international $
1990	11434.3296824358
1991	10077.300451935
1992	9246.11231932634
1993	9383.6653811779
1994	9774.85621316067
1995	10385.0595660608
1996	10805.2447505506
1997	10301.8869874115
1998	10084.83135292
1999	10057.7859195486
2000	10368.3735350699
2001	11071.317931862
2002	11875.2996455886
2003	12082.6162770421
2004	13164.5400339848
2005	14032.3222271368
2006	15170.7348679765
2007	16494.2982527867
2008	18478.0058931134
2009	17801.3076354975
2010	17207.0498427228
2011	17608.1791430646
2012	18044.4963491351
2013	18653.7823159299
2014	19558.433372078
2015	20157.4952102116
2016	21173.3342650885
2017	22828.2026053834
2018	23905.8072981691