Year	constant 2015 US$
1991	1964.1329743276947
1992	3191.4111152367923
1993	2684.581219811059
1994	2996.6281048434776
1995	3508.3892940504716
1996	3807.6705015730095
1997	4067.403378176193
1998	4186.830735425414
1999	4459.669207538529
2000	4184.540245231598
2001	4596.7081510169155
2002	5327.50684878008
2003	5955.781261227106
2004	6684.1627831310525
2005	7713.518539171255
2006	9339.209714945911
2007	10230.25073549423
2008	10758.072255111094
2009	9970.410588616414
2010	10824.604417951767
2011	10664.55721990418
2012	11256.444714517891
2013	11592.027233443006
2014	12404.185074086368
2015	12554.396287620624
2016	13050.784074264628
2017	14472.452330014712
2018	15896.748904173975
2019	15905.988209603389
2020	15050.803966323685
2021	16520.180349456878
2022	19194.306974403902