Year	constant 2011 international $
1990	5583.54068857807
1991	8005.55399855664
1992	8853.58095450309
1993	9293.166861125
1994	9582.26890185167
1995	9838.78646579753
1996	10699.659875052
1997	10671.385139671
1998	10957.4515975112
1999	10742.0939004538
2000	10617.0786938319
2001	10615.288252841
2002	10476.7377224969
2003	10306.7413117181
2004	10521.4562768735
2005	10512.9462382743
2006	10554.8154481136
2007	11522.3571128934
2008	12594.9186500507
2009	13722.2135327805
2010	14405.9606020753
2011	13841.5350103708
2012	13354.7641418248
2013	12833.3614974067
2014	12349.0359857229
2015	11887.2672667924
2016	11756.9733208141
2017	11647.0180912718
2018	11607.1758201045