Year	constant 2015 US$
1991	9124.760526487426
1992	9312.556536904307
1993	9499.862083800243
1994	9343.959306729153
1995	9728.643025051499
1996	9763.663159938664
1997	9889.914499901486
1998	9409.862586202178
1999	9113.180536917
2000	9055.446406072862
2001	8978.907483629555
2002	8807.10679426076
2003	8549.755613537305
2004	8877.127096523436
2005	8980.978831449958
2006	9096.334109922636
2007	8929.579990444789
2008	8933.59966685279
2009	8888.337955822099
2010	8816.323616685744
2011	9157.712898859134
2012	9068.5367066397
2013	8845.536712429992
2014	9013.292551881066
2015	9372.002394509711
2016	9413.253182575225
2017	9663.42357056494
2018	9659.156609236334
2019	9601.845625725064
2020	9528.22094217362
2021	9935.906876041707
2022	9872.880994449886