Year	constant 2011 international $
1990	4961.75540518898
1991	5160.77592476267
1992	5368.24086055158
1993	5584.93962124223
1994	5860.23156969447
1995	6170.24495682802
1996	6482.60750403881
1997	6704.54034497545
1998	6629.9825607548
1999	6839.36690169599
2000	7172.84212513861
2001	7380.14417536337
2002	7691.3404585657
2003	8062.75904969064
2004	8521.43175079091
2005	9016.61922114136
2006	9606.96878477851
2007	10341.8069225669
2008	10804.6144974079
2009	11121.5875022655
2010	11952.6318835595
2011	12597.2729126996
2012	13229.2749172282
2013	13883.1612791672
2014	14503.0419908223
2015	15126.2934532821
2016	15768.6765184227
2017	16500.7161219372
2018	17236.3425068947