Year	constant 2015 US$
1991	11724.035308766115
1992	11507.005102295087
1993	11558.115426658956
1994	11105.79357338719
1995	11118.74358459566
1996	11140.812412261152
1997	11237.66532562374
1998	10906.230031460096
1999	10430.958395798181
2000	11060.390495111453
2001	10557.534617728812
2002	11071.662370866652
2003	10856.751222900784
2004	10418.787719441158
2005	10686.575400312971
2006	10771.53938581214
2007	10770.323945519896
2008	11350.980425823884
2009	12130.728409215195
2010	12593.391066703096
2011	13188.007995912278
2012	13486.481362956712
2013	14180.98773517809
2014	14599.10970432199
2015	14214.634736594031
2016	13637.736428614431
2017	13968.165907644097
2018	14665.655579766328
2019	14486.898297469545
2020	14858.468007363259
2021	14582.669628338934
2022	15165.473607550783