Year	constant 2011 international $
1990	4382.56022814554
1991	4337.39362790641
1992	4306.60831666895
1993	4346.08305870398
1994	4376.58585236419
1995	4473.6301555139
1996	4628.38315415377
1997	4773.0071485711
1998	4801.51552488536
1999	4909.92662905672
2000	5108.63851002321
2001	5222.92188437424
2002	5382.81480980564
2003	5614.14856804123
2004	5963.89011200717
2005	6297.73289541889
2006	6708.28269007829
2007	7177.52148887291
2008	7473.46137682219
2009	7581.03474469932
2010	8028.3736614577
2011	8383.35967304769
2012	8700.88802004781
2013	9033.26719602307
2014	9337.77648693882
2015	9614.08818525767
2016	9944.61919975304
2017	10317.7367969928
2018	10692.7847136247