a    2017
b    Refers to Altindag, Cankaya, Etimesgut, Golbasi, KeƁioren, Mamak, Sincan and Yenimahalle.
c    2019
d    2018
e    Data classified according to ISIC Rev. 4.
f    Excludes publishing activities. Includes irrigation and canals.
g    Excludes repair of personal and household goods.
h    Excludes computer and related activities and radio/TV activities.
i    Estimate.
j    2016
k    Data refers to a 5-year period preceding the reference year.
l    Including refugees.
m    Data as at the end of December.
n    Refugee figure is a Government estimate and pertains only to Syrian refugees.
o    2006
p    Data are as at 1 January of reporting year.
q    Population aged 16 to 74 years.
r    Users in the last 12 months.
s    Turkish citizens resident abroad are included.