Year	constant 2015 US$
1994	855.9083525407162
1995	952.9047817775888
1996	999.0756370073968
1997	1088.177988136592
1998	1151.2538732221628
1999	1172.335623399466
2000	1283.5634413608689
2001	1391.4936616669504
2002	1520.3389553479653
2003	1641.7968277313519
2004	1798.6291507442113
2005	1974.0246979343365
2006	2152.372934026701
2007	2454.910059604002
2008	2604.7404025293927
2009	2504.4514231667426
2010	2615.505928133362
2011	2694.11200268983
2012	2953.4533081411196
2013	3017.2915192404
2014	3077.4280393029076
2015	2856.5054475725647
2016	2811.0844550706465
2017	3219.4299627541745
2018	3392.411747090715
2019	3804.3075186050037
2020	3290.2987393799604
2021	3398.782677561291
2022	3596.147136862018
2023	3830.9497059400524