Year	constant 2011 international $
1990	2348.09462351218
1991	2304.44126351214
1992	2213.4117887549
1993	2152.37858204209
1994	2142.30079016239
1995	2170.82398963387
1996	2195.90789849934
1997	2144.36616043659
1998	2153.79477210205
1999	2143.34549272163
2000	2097.79568949405
2001	2118.50144639681
2002	2073.08691319144
2003	2076.83638503599
2004	2124.25426644086
2005	2188.93806478149
2006	2267.21895637948
2007	2356.39044729596
2008	2297.40119974035
2009	2308.97677835843
2010	2435.83373551697
2011	2515.92747137232
2012	2561.61018039684
2013	2642.10123471678
2014	2713.30027092938
2015	2797.86358364244
2016	2891.48715404093
2017	2961.46173810708
2018	3076.84481792643