Year	constant 2011 international $
1990	2580.50055464827
1991	2370.5516818711
1992	2498.64974008635
1993	2500.28424220294
1994	2301.73235728978
1995	2319.02778469298
1996	2227.08046349489
1997	2255.32718638077
1998	2224.71977501759
1999	2209.80740258133
2000	2388.51199501145
2001	2384.73809454244
2002	2381.94535434283
2003	2374.79437281658
2004	2363.57573377472
2005	2373.42081480282
2006	2378.69295703641
2007	2340.94004009642
2008	2376.75648180604
2009	2394.43982017218
2010	2426.18249620984
2011	2465.32491834502
2012	2483.40992411992
2013	2533.44379757944
2014	2525.72610934726
2015	2494.27415988142
2016	2490.64862316343
2017	2500.56944336091
2018	2513.66524305135