Year	constant 2015 US$
1991	11832.598816225745
1992	12501.00711210333
1993	12272.15342129727
1994	11798.57624327469
1995	11321.10719024764
1996	11592.950667920546
1997	12012.919693197271
1998	10995.004631849602
1999	11111.135552718973
2000	11853.083321519824
2001	11672.228909891921
2002	11819.335252770885
2003	12753.387445453145
2004	12697.62051042605
2005	12573.151131648992
2006	12889.385654978292
2007	13503.61535891071
2008	13462.223826693611
2009	12102.717932486004
2010	13626.626887332766
2011	13804.43200575842
2012	13500.280649384615
2013	13725.413926590398
2014	13714.644114371054
2015	13739.007300983625
2016	14303.210738771602
2017	14938.958378013673
2018	15488.479669130596
2019	16010.15830166652
2020	15275.538282399604
2021	15088.329363609202
2022	15372.795980386101