Year	constant 2015 US$
2000	2202.8156115115366
2001	2296.99834208802
2002	2420.684355841748
2003	2538.405158104889
2004	2647.679185756183
2005	2808.779861889712
2006	2938.7720286093186
2007	3134.629177644313
2008	3346.813808822627
2009	3258.106204438603
2010	3318.1375017179394
2011	3373.010153293874
2012	3413.7040876651263
2013	3469.0824324699356
2014	3581.754783878126
2015	3691.3756149301266
2016	3819.5827320346907
2017	3920.021500249683
2018	4052.2002339796704
2019	4194.3963964388295
2020	4100.261414120072
2021	4333.543646195408
2022	4466.004657482738
2023	4567.774530153967