Year	constant 2011 international $
1990	6878.40725834841
1991	7110.2529961012
1992	7193.46067272292
1993	7249.05518788159
1994	7420.03586339619
1995	7449.74720798109
1996	7395.32944786947
1997	7584.06807458277
1998	7640.68539666214
1999	6968.9420761471
2000	6896.53553477568
2001	7170.42347261764
2002	7372.19247059094
2003	7425.42343891087
2004	7873.01510541037
2005	8197.29641673449
2006	8447.24030206897
2007	8484.76544963798
2008	9013.32732632494
2009	8950.99415492436
2010	9168.27202201623
2011	9726.87699033477
2012	10136.1139378517
2013	10481.5891635722
2014	10702.2319994397
2015	10523.5120900693
2016	10208.2045250028
2017	10220.2481780746
2018	10141.1455486939