Year	constant 2011 international $
1990	5515.56869069525
1991	5462.79448858332
1992	5962.64859842063
1993	6284.59868303096
1994	6332.84796330351
1995	6576.88195650141
1996	6853.01909070332
1997	7340.42052836093
1998	7709.30507610947
1999	8041.10343971633
2000	8288.75930039353
2001	8366.91142621868
2002	8616.37748471562
2003	8380.03966187037
2004	8476.5333052345
2005	9150.49868620112
2006	9858.4091968239
2007	10453.2354480745
2008	10652.7462560792
2009	10620.2944384367
2010	11365.4939987589
2011	11580.568776398
2012	11754.2730554339
2013	12183.3965554153
2014	12962.8465130076
2015	13717.3584553551
2016	14461.1366716752
2017	14953.4364888818
2018	15821.2017735622