Year	constant 2015 US$
1991	7283.477112549661
1992	6689.747839062339
1993	4778.438243523223
1994	5037.175309488296
1995	5685.063376532297
1996	5747.552603462321
1997	9007.012607188592
1998	7483.496725109003
1999	7572.605446397164
2000	7336.647736714354
2001	10425.924551870394
2002	9984.19966318748
2003	9152.110803260062
2004	9559.86172487842
2005	10512.744793474902
2006	11056.296077233828
2007	8317.641860178532
2008	10752.501089139709
2009	10695.405139065477
2010	10311.749021527115
2011	11353.493226858687
2012	10715.955100296193
2013	10731.692609869744
2014	10745.335965449533
2015	9939.627360506482
2016	10881.475597558407
2017	10864.376007247014
2018	11328.021804831335
2019	11411.405523963149
2020	11469.74154053692
2021	15696.995633698067
2022	15046.210734332608