a    Projected estimate (medium fertility variant).
b    2015.
c    Refers to the urban population of cantons.
d    2016.
e    Data classified according to ISIC Rev. 4.
f    Estimate.
g    Central area.
h    2014.
i    Data refers to a 5-year period preceding the reference year.
j    Including refugees.
k    Data as at the end of December.
l    Data revision.
m    2000.
n    2013.
o    2004.
p    Provisional data.
q    Population aged 5 years and over.
r    Users in the last 3 months.