Year	constant 2011 international $
1990	2642.75507478477
1991	2583.18561971547
1992	2509.52547165844
1993	2425.08531723125
1994	2384.82717473558
1995	2399.60982606042
1996	2459.15715045305
1997	2482.15533465801
1998	2478.56309380936
1999	2468.6827982615
2000	2488.8147579487
2001	2533.46085920785
2002	2627.17589137644
2003	2672.26444124235
2004	2776.38919209736
2005	2873.04783120508
2006	2970.53123881991
2007	3084.54706384337
2008	3168.11966440059
2009	3191.82705151066
2010	3287.91828442232
2011	3347.4479164848
2012	3389.82709152108
2013	3473.88689242878
2014	3548.31150289234
2015	3560.63413101973
2016	3519.73160540761
2017	3524.88466723251
2018	3525.60346596697