Year	constant 2010 US$
1991	1604.81227313285
1992	1465.33792411966
1993	1477.71402834414
1994	1380.53010147322
1995	1390.58159403664
1996	1383.94423229308
1997	1340.4585568066
1998	1305.97864028582
1999	1242.32005592995
2000	1194.59028159074
2001	1186.90666296681
2002	1131.9440427972
2003	1117.84253798488
2004	1048.47043571829
2005	1062.71985303259
2006	1063.22873366091
2007	1076.28226757934
2008	967.376197477788
2009	997.217112507479
2010	956.729447221499
2011	919.965257283221
2012	879.460329874275
2013	896.523588079305
2014	862.702299209278
2015	798.08865444105
2016	802.779749907829
2017	789.48402890113
2018	781.729978408761