Year	constant 2015 US$
1991	2872.1858272397917
1992	2865.1450838553747
1993	2835.501814902204
1994	2849.0342682806167
1995	2850.8002847862895
1996	2931.9539698744543
1997	3046.613881669311
1998	2768.0673775659666
1999	2992.3660413202383
2000	2962.7641381169265
2001	2847.9702866264784
2002	2923.150308751437
2003	2908.44707724684
2004	2724.6338520474487
2005	2827.21879950459
2006	2914.2322340766304
2007	3102.481036374649
2008	3217.3430585232127
2009	3327.7546803742157
2010	3397.2160699378555
2011	3654.7567749687955
2012	3508.581935928798
2013	3919.8726682514603
2014	4366.967350368508
2015	4091.595474193678
2016	3875.9383444107852
2017	3905.3561564428383
2018	3761.3454740793645
2019	3668.6991418602424
2020	3799.52915904797
2021	3612.2632826423146
2022	3669.1858414743415