a    2017
b    Refers to the urban population of cantons.
c    2018
d    Data classified according to ISIC Rev. 4.
e    Estimate.
f    Central area.
g    Calculated by the UN Statistics Division from national indices.
h    Break in the time series.
i    2016
j    Data refers to a 5-year period preceding the reference year.
k    2015
l    Including refugees.
m    Data as at the end of December.
n    2000
o    2013
p    2004
q    Population aged 5 years and over.
r    Users in the last 3 months.
s    2014