Year	constant 2015 US$
1991	12197.09900349571
1992	12357.565196818106
1993	12447.129031921431
1994	12259.114490550326
1995	12033.83988204316
1996	12294.319666098552
1997	12135.03743576726
1998	12264.205084149597
1999	12074.731658048786
2000	11411.907757880235
2001	11940.189193846138
2002	12242.086727683543
2003	11926.050936324245
2004	12825.61856401743
2005	13105.04113299034
2006	13540.559753364663
2007	14134.13900106718
2008	14473.654637785889
2009	14454.404742372913
2010	14878.203124247691
2011	15096.478869981433
2012	15578.620469965601
2013	15596.953922435221
2014	15679.457127954516
2015	15368.864675510038
2016	15343.328480761844
2017	15669.701101530893
2018	15571.700945043882
2019	16122.620542808885
2020	16192.615867777142
2021	16357.347438445382
2022	16907.35010168807