a    Projected estimate (medium fertility variant).
b    2015
c    Refers to Altindag, Cankaya, Etimesgut, Golbasi, Ke├žioren, Mamak, Sincan and Yenimahalle.
d    2017
e    2016
f    Data classified according to ISIC Rev. 4.
g    Estimate.
h    Break in the time series.
i    Calculated by the Statistics Division of the United Nations from national indices.
j    Excluding water and waste management.
k    2014
l    Data refers to a 5-year period preceding the reference year.
m    Including refugees.
n    Data as at the end of December.
o    2004
p    2006
q    2012
r    Users in the last 12 months.
s    Population aged 16 to 74 years.
t    Turkish citizens resident abroad are included.
u    Provisional data.