a    Including Crimea.
b    Projected estimate (medium fertility variant).
c    2015
d    2017
e    Excludes the temporarily occupied territory of the Autonomous Republic of Crimea and Sevastopol.
f    2016
g    Data classified according to ISIC Rev. 4.
h    Estimate.
i    Data classified according to ISIC Rev. 3.
j    2012
k    Data refers to a 5-year period preceding the reference year.
l    Data as at the end of December.
m    2014
n    2009
o    Population aged 15 to 59 years.
p    Users in the last month.
q    Excluding data from some regions, provinces or states.
r    2004