a    Projected estimate (medium fertility variant).
b    2015.
c    Refers to urban population in the city districts.
d    2016.
e    Data classified according to ISIC Rev. 4.
f    Estimate.
g    Series linked to former series.
h    2014.
i    Data refers to a 5-year period preceding the reference year.
j    Refers to foreign citizens.
k    Including refugees.
l    Data as at the end of December.
m    Data revision.
n    2013.
o    2011.
p    2002.
q    2004.