Year	constant 2010 US$
1991	3213.61983003411
1992	3409.29325140083
1993	3550.35148761332
1994	3676.07951139363
1995	3787.08364836848
1996	3888.22468500589
1997	4149.47871605693
1998	4401.65462472586
1999	4747.97117905437
2000	5084.77673341419
2001	5543.61067893668
2002	6032.73352949787
2003	6391.8658023298
2004	6623.01895914958
2005	7052.34611040173
2006	7624.06204802827
2007	8445.44850506073
2008	9077.156155661
2009	9604.43369453203
2010	10197.2322782992
2011	10731.8052344032
2012	11243.5133950702
2013	11627.2746472868
2014	12068.4131110285
2015	12689.6906046785
2016	13348.933310282
2017	14082.0670274812
2018	14988.4532393827