Year	constant 2015 US$
1991	828.7071049046147
1992	800.4043605552581
1993	801.9613154969895
1994	799.8747663897361
1995	825.1567990086378
1996	837.8855760509294
1997	843.6670756861851
1998	854.4417688457394
1999	862.0722763515201
2000	860.3050946143183
2001	872.3308150795477
2002	873.0525558749652
2003	888.3472977823469
2004	914.9693267203893
2005	943.0993881322888
2006	988.7347047540153
2007	1014.3564605202478
2008	1016.25694743956
2009	1010.1104722879335
2010	1040.0930815468466
2011	1037.210262020875
2012	1057.9664440040594
2013	1083.1322567312016
2014	1092.0567251834614
2015	1116.3557786638753
2016	1114.403334773069
2017	1117.8793054355535
2018	1122.2922199912334
2019	1130.164552714383
2020	1079.1633591286306
2021	1107.6893448412188
2022	1120.7124622230338
2023	1123.7427754938326