a    2017
b    Refers to Greater Cairo as the sum of the Governorate of Al-Qahirah (Cairo) and the surrounding districts of the Governorates of Al-Jizah (Giza) and Al-Qaly¸byah (Qalyubia).
c    2019
d    2018
e    At factor cost.
f    Estimate.
g    Urban areas.
h    Calculated by the UN Statistics Division from national indices.
i    2016
j    Special trade system up to 2007.
k    Data refers to a 5-year period preceding the reference year.
l    Including refugees.
m    Data as at the end of December.
n    2008
o    2014
p    2012
q    Data are as at 1 January of reporting year.
r    Population aged 6 years and over.
s    Excluding business enterprise.
t    Excluding private non-profit.
u    Data refer to fiscal years beginning 1 July.