Year	constant 2015 US$
1990	1641.9831453981615
1991	1425.3867413799737
1992	839.5720298752307
1993	791.6469961542855
1994	855.0810409481966
1995	928.0924965773221
1996	989.6423432251926
1997	1031.0982588437046
1998	1116.9071922387063
1999	1166.187961650357
2000	1249.612129265681
2001	1385.0447940779134
2002	1582.0576216709233
2003	1815.788224479994
2004	2018.460140870204
2005	2312.982861335375
2006	2636.2566481970034
2007	3019.4655606402216
2008	3250.498611011453
2009	2810.1928405122962
2010	2889.566228171149
2011	3043.2627861360907
2012	3278.670448111758
2013	3402.0838545233314
2014	3538.5293922785772
2015	3666.1418221090494
2016	3689.83008213399
2017	3985.9166983517684
2018	4215.899394405243
2019	4561.967798947512
2020	4256.131227854532
2021	4526.597488786409
2022	5116.205756294397
2023	5566.318492913517