Year	constant 2015 US$
1991	2138.785464418052
1992	2267.7906053318466
1993	2198.327670776703
1994	2200.809550474151
1995	2436.0162154702957
1996	2593.387154293119
1997	2557.7365882825598
1998	2509.148468084013
1999	2468.010961833701
2000	2420.830077136189
2001	2348.592536456388
2002	2440.019760452657
2003	2453.525429945962
2004	2395.9994223291587
2005	2505.215789166817
2006	2481.7203758981805
2007	2477.7933818871447
2008	2370.500887442285
2009	2440.139744496678
2010	2356.5070654879396
2011	2367.5553260220527
2012	2482.33106209221
2013	2520.0407249221425
2014	2533.3826725420827
2015	2610.6983541847044
2016	2491.7503087506166
2017	2699.389680688044
2018	2976.946950924187
2019	2863.6387721392753
2020	2969.0519001100565
2021	3021.260834719939
2022	3105.6886126299833