Year	constant 2015 US$
1991	1252.5705335516845
1992	1292.2609583566941
1993	1316.945188300017
1994	1358.3669925272372
1995	1400.9591696186994
1996	1480.1088503403953
1997	1480.438687364444
1998	1506.8963328229065
1999	1525.1974599833065
2000	1519.5529805005915
2001	1566.0675792975019
2002	1605.7053810483048
2003	1682.8540019831403
2004	1782.399250276236
2005	1901.0514436033795
2006	2006.5442911214056
2007	2097.149722368387
2008	2169.344583761734
2009	2241.2462877418
2010	2373.7709193201526
2011	2528.5289847361155
2012	2656.75099780398
2013	2841.065918896712
2014	2998.967742571107
2015	3142.8454588995305
2016	3263.894790888371
2017	3452.0710869077143
2018	3611.9901631291273
2019	3774.6813214207996
2020	3859.3768659375132
2021	3975.4765995535417
2022	4045.692248730095