a    Projected estimate (medium fertility variant).
b    2015.
c    2016.
d    Data classified according to ISIC Rev. 4.
e    Estimate.
f    Break in the time series.
g    2014.
h    Excluding water and waste management.
i    Data refers to a 5-year period preceding the reference year.
j    Data as at the end of December.
k    2000.
l    Excludes prepaid cards that are used to provide Travel SIM/WorldMobile service.
m    Population aged 16 to 74 years.
n    Users in the last 3 months.
o    2004.
p    Calculated on the basis of accommodation statistics and ´Foreign Visitor Survey´ carried out by the Statistical Office of Estonia. Starting from 2004, border statistics are not collected any more.
q    Based on mobile positioning data by the Bank of Estonia and Positium LBS.
r    Provisional data.