Year	constant 2011 international $
1990	20163.0574600569
1991	20618.4299693168
1992	20434.009758272
1993	21063.2815872172
1994	21294.6975091019
1995	23329.811182212
1996	21839.5720899225
1997	22820.8414198728
1998	22130.0398869928
1999	23903.6167499069
2000	25002.3652968653
2001	23756.0556259462
2002	23138.1574946235
2003	22762.7309861916
2004	25802.2935079607
2005	25252.120764273
2006	25329.6818522264
2007	25878.0824399217
2008	24711.0818130033
2009	23294.7451774036
2010	22444.4620745682
2011	22394.858535383
2012	23946.4596589449
2013	24267.9914595259
2014	24260.7959843314
2015	24190.3627743147
2016	24621.1241284024
2017	24006.2089547509
2018	23358.5802605259