Year	constant 2011 international $
1990	112349.597966668
1991	106956.142032301
1992	104302.087362096
1993	99773.3181305517
1994	101017.748526493
1995	102387.224757103
1996	103032.432941286
1997	105953.226103222
1998	100904.474777361
1999	98483.1176717058
2000	103318.150198103
2001	99413.7868109256
2002	96679.2963477404
2003	98580.5219791448
2004	98543.2474507683
2005	91624.9361676699
2006	87120.0651423881
2007	77235.8544138785
2008	69351.0196603659
2009	58843.4694238097
2010	55362.9898190898
2011	56574.2881750551
2012	57851.6938744732
2013	60403.0455846444
2014	62948.6779019635
2015	65788.9454507369
2016	67045.1042913884
2017	66675.9734655062
2018	66615.9269331784