a    2017
b    Refers to the Greater Copenhagen Region, consisting of (parts of) 16 municipalities.
c    2018
d    Data classified according to ISIC Rev. 4.
e    Estimate.
f    Calculated by the UN Statistics Division from national indices.
g    2016
h    Excluding water and waste management.
i    2014
j    Undisclosed (Special categories).
k    Data refers to a 5-year period preceding the reference year.
l    2015
m    Data as at the end of December.
n    Population aged 16 to 74 years.
o    Users in the last 3 months.
p    2004
q    Excluding the Faroe Islands and Greenland.
r    Break in the time series.
s    Development Assistance Committee member (OECD).