Year	constant 2011 international $
1990	3587.41238992845
1991	3703.67305865096
1992	3845.03864170868
1993	4076.48149497219
1994	4239.02671707937
1995	4408.39638907638
1996	4539.61407311216
1997	4814.98569643881
1998	4992.81282427674
1999	5168.2096691526
2000	5440.662843224
2001	5322.62349174513
2002	5504.67263198664
2003	5815.78859332942
2004	6077.48537159133
2005	6391.45460154718
2006	6819.66610052036
2007	7250.39226439085
2008	7537.45075626951
2009	7834.92703430783
2010	8408.51402877581
2011	9064.29214842044
2012	9803.8196722006
2013	9996.40865034735
2014	10399.0261776133
2015	10788.547452804
2016	11124.2434388625
2017	11378.2434013595
2018	11610.9081762221