a    Projected estimate (medium fertility variant).
b    Including Kosovo.
c    Changes in total area per year are the result of new measuring and correcting of the administrative borders between former Yugoslavian countries.
d    2015.
e    Refers to Belgrade settlement.
f    2016.
g    Excluding Kosovo and Metohija.
h    Data classified according to ISIC Rev. 4.
i    Estimate.
j    Break in the time series.
k    Index base: 2006=100.
l    2011.
m    2014.
n    Excluding water and waste management.
o    Data refers to a 5-year period preceding the reference year.
p    Data as at the end of December.
q    Includes inactive pre-paid subscriptions.
r    Population aged 16 to 74 years.
s    Excluding data from some regions, provinces or states.
t    Do not correspond exactly to Frascati Manual recommendations.
u    Excluding Kosovo.