Year	constant 2011 international $
1994	3236.19636824262
1995	3314.76116279982
1996	3208.11989948587
1997	3517.56995431349
1998	3920.32000968822
1999	4137.84386377844
2000	3688.34210113563
2001	3260.54467926006
2002	2781.34197978374
2003	3091.16637072217
2004	3324.83440684828
2005	3590.93517385068
2006	3363.80570536278
2007	3495.04252198951
2008	3606.89983826492
2009	3816.16507033626
2010	4019.48506667715
2011	4405.77857347918
2012	4568.50907041582
2013	4559.03225887244
2014	4445.30747041337
2015	4493.61207984613
2016	4600.68539961298
2017	4651.72364458842
2018	4576.43249715837