Year	constant 2015 US$
1991	1325.6663575362475
1992	1363.6751808896583
1993	1392.2587922585333
1994	1440.077880949369
1995	1493.6178890725569
1996	1575.884077846552
1997	1579.7749090538623
1998	1596.097729100588
1999	1611.569764805609
2000	1625.974839375081
2001	1688.587908595696
2002	1713.7034794115532
2003	1792.9369246633096
2004	1909.938466960345
2005	2033.3672500896837
2006	2157.434119275425
2007	2252.108979674136
2008	2340.557275576362
2009	2418.558655810025
2010	2561.8939289204586
2011	2763.0925473805555
2012	2900.551393196903
2013	3133.2638400859787
2014	3323.996286014205
2015	3494.0774821303157
2016	3660.7353007786082
2017	3895.128344973252
2018	4088.8486117490943
2019	4314.819643522105
2020	4404.605754940487
2021	4550.3881066468975
2022	4648.905957042454