Year	constant 2015 US$
1991	829.6333768882869
1992	801.6841620482302
1993	803.5090485516064
1994	801.0525380488114
1995	826.5816359723254
1996	839.3218844426325
1997	845.1337739059991
1998	855.849693584789
1999	863.1284914076466
2000	860.6030114419082
2001	872.7416236958948
2002	873.2266146575417
2003	888.5988608920643
2004	915.2589049689703
2005	943.5398237251936
2006	989.3326641909025
2007	1014.7013865555502
2008	1017.1428053637259
2009	1010.8547658595985
2010	1040.797892291469
2011	1038.066493145008
2012	1058.8086155290164
2013	1083.6391620873894
2014	1092.8257036244433
2015	1117.064434132279
2016	1115.330750500955
2017	1118.8899385891955
2018	1123.4124228989442
2019	1131.2683961178334
2020	1080.2466566006635
2021	1108.9026605557788
2022	1121.9579231893774
2023	1123.8550884987708