Year	constant 2015 US$
1991	26000.543945119192
1992	26085.12289404221
1993	26655.259750693203
1994	27551.230080622194
1995	28724.244188409426
1996	29578.30423245829
1997	30315.44933591887
1998	30355.969770901273
1999	31974.208980786207
2000	32777.130780828644
2001	33449.87512940717
2002	34899.60677383557
2003	35668.13379137425
2004	35294.2920525048
2005	36132.6579750766
2006	36940.10876349897
2007	38171.59743830181
2008	38962.090003197016
2009	39305.79439303425
2010	40813.2242936367
2011	41292.148582538815
2012	41680.242370695305
2013	42579.95698394144
2014	42729.72963116425
2015	43818.77806946922
2016	44427.41621420094
2017	45127.037629961545
2018	46671.34678100995
2019	47395.36049077719
2020	47652.14180527118
2021	48968.04753580429
2022	49593.53983777226