a    2017
b    Refers to the Governorate of Grand Algiers.
c    2018
d    Estimate.
e    Algiers
f    Calculated by the UN Statistics Division from national indices.
g    2016
h    Data classified according to ISIC Rev. 3.
i    2014
j    Data refers to a 5-year period preceding the reference year.
k    2015
l    Including refugees.
m    Data as at the end of December.
n    2007
o    2008
p    2011
q    Partial data.
r    2004
s    Including nationals residing abroad.