Year	constant 2015 US$
1991	9973.852841184364
1992	10436.249881688871
1993	10745.34043817596
1994	10723.727461226117
1995	10958.120196194324
1996	11036.643107375006
1997	11542.222986080262
1998	11160.815775993957
1999	11431.455136546925
2000	11106.434942381022
2001	11427.003206854712
2002	11351.510258087099
2003	11370.527650286343
2004	11545.398776424277
2005	12149.907521030224
2006	12421.716729541573
2007	12874.74606875092
2008	12892.085744730262
2009	12970.53641869652
2010	13301.737931952262
2011	13152.281329861033
2012	13191.59772142321
2013	13187.954559971815
2014	13833.819962396854
2015	13813.259889933965
2016	14270.333845280977
2017	14587.122091772842
2018	14847.055990543318
2019	14749.545461805697
2020	14566.859683776991
2021	15014.231442285318
2022	15564.548345570998