Year	constant 2015 US$
1991	3239.4483262750773
1992	3135.5761944840688
1993	3020.6542238318134
1994	2924.330029126793
1995	2858.590369912205
1996	2775.2292329920365
1997	2705.045103405896
1998	2657.369473294168
1999	2558.523455108966
2000	2480.5745746078837
2001	2427.75046103796
2002	2473.416655379422
2003	2958.8660763691973
2004	2778.618912580851
2005	2894.769799727918
2006	2991.6350470940433
2007	3086.8864469477026
2008	3043.1190677714217
2009	3096.5173055162268
2010	3031.7440586156545
2011	2709.4474407495745
2012	3025.077534895597
2013	3492.9862560285183
2014	3346.2901281117042
2015	3311.7764034399684
2016	3585.469835310192
2017	3322.951225319958
2018	3228.0418452269428
2019	3468.4713066436357
2020	3564.85573565836
2021	3688.0952154530464
2022	3925.812604500632