Year	constant 2011 international $
1990	10556.631688505
1991	11258.2727182347
1992	11947.1822632351
1993	12804.4040048711
1994	13639.1370253099
1995	14606.7690723135
1996	15662.6540213634
1997	16384.5867213472
1998	14799.9975723687
1999	15329.4411821779
2000	16304.0108205432
2001	16032.5255051819
2002	16548.3580066435
2003	17158.6494533798
2004	17964.8576052536
2005	18554.5172120025
2006	19208.4309637234
2007	20022.1874847035
2008	20592.2351152529
2009	19915.659386568
2010	21035.6239366716
2011	21806.8227852715
2012	22670.2932976158
2013	23411.6377451035
2014	24487.4478206053
2015	25390.4352588725
2016	26105.8774178268
2017	27271.8592254163
2018	28176.4040065443