Year	constant 2015 US$
1991	3650.6265272523424
1992	3418.3623181721227
1993	3452.5169603960385
1994	3168.052137551467
1995	3084.856975485769
1996	3079.0932547731127
1997	3150.2740949536706
1998	2991.1219210824765
1999	2902.167531877492
2000	3127.5864078882373
2001	3420.6500506969746
2002	3751.9796577661314
2003	3783.5938955509732
2004	4285.279896264582
2005	4431.630201003112
2006	4680.5570481616005
2007	4707.473533763239
2008	5041.602101720619
2009	5355.1099528961695
2010	5217.5049674357015
2011	5632.253201218211
2012	5574.704714688701
2013	6024.504039755635
2014	6366.3928829963925
2015	6673.8317758192825
2016	6908.349308817554
2017	7245.444640240796
2018	7526.987562358296
2019	7830.061355317307
2020	8143.5201473525
2021	8246.7582924202
2022	8816.94742464271