Year	constant 2015 US$
1991	2988.621514016244
1992	3346.7924233824665
1993	3348.838635113606
1994	3149.4763022973743
1995	3407.8775269811213
1996	3522.185216659974
1997	3395.213206840944
1998	4027.447622870641
1999	3739.910299358335
2000	4167.101428339423
2001	5118.317381663869
2002	4808.904353700553
2003	5526.991760336779
2004	5125.765639503766
2005	5655.466940828842
2006	5856.9514323236
2007	6361.0779525014295
2008	6088.173846996473
2009	6648.5210912136
2010	7254.908919101775
2011	7757.875905273671
2012	8179.893761281778
2013	8561.61105989816
2014	8395.189875583996
2015	9495.859409668881
2016	10631.629248849675
2017	10180.931279618495
2018	10627.422948165906
2019	11416.11997288296
2020	12201.343932002084
2021	13410.773896432505
2022	14084.288906855954