Year	constant 2011 international $
1990	20108.8982254996
1991	21078.7140658514
1992	21421.0708232109
1993	20975.6810843196
1994	21061.9796347833
1995	22018.4793216138
1996	22607.8610762397
1997	23334.4544030679
1998	24291.215715146
1999	25095.428272683
2000	25509.6498245987
2001	25794.4998804852
2002	25913.4238544983
2003	25701.4567030325
2004	26041.071593135
2005	26181.93371277
2006	26101.635847666
2007	26694.4432573811
2008	26526.3622794093
2009	25753.3406536805
2010	26317.6891037221
2011	26264.2433114146
2012	25180.4223532015
2013	25304.574142775
2014	25572.0157255933
2015	25859.7310034201
2016	26558.7234541471
2017	27403.8518409237
2018	27935.3852553337