Year	constant 2015 US$
1994	1087.486012840811
1995	1093.596700816525
1996	1123.8533445225955
1997	1120.2531923931176
1998	1107.0626870391202
1999	1097.241764866501
2000	1101.845503035968
2001	1102.9185109261748
2002	1120.3471122605395
2003	1136.2089681968191
2004	1174.8442505140276
2005	1217.4909700170529
2006	1271.336166255454
2007	1318.064379087246
2008	1336.9449452765168
2009	1321.4805397913879
2010	1353.0934398976894
2011	1388.0647518125108
2012	1406.1721918216365
2013	1424.5537000055265
2014	1436.0254111169304
2015	1447.9928464726686
2016	1455.8886771080338
2017	1459.8972441690448
2018	1463.7546886790371
2019	1462.9998648502287
2020	1404.9954131213779
2021	1442.6352275024065
2022	1447.3002139679236
2023	1447.3253527462582