a    Surface area is based on the 2002 population and housing census.
b    2017
c    African Financial Community (CFA) Franc, Central Bank of West African States (BCEAO).
d    Refers to the sum of the Departments of Dakar, Pikinie and Guédiawaye, in Dakar Region.
e    2018
f    Data classified according to ISIC Rev. 4.
g    Estimate.
h    Data refer to the national index.
i    Calculated by the UN Statistics Division from national indices.
j    2016
k    Data classified according to ISIC Rev. 3.
l    Country data supplemented with data from the Observatoire Economique et Statistique d’Afrique Subsaharienne (Afristat).
m    2014
n    Data refers to a 5-year period preceding the reference year.
o    2015
p    Including refugees.
q    Data as at the end of December.
r    2004
s    2008
t    Population aged 12 years and over.
u    Excluding business enterprise.