a    Projected estimate (medium fertility variant).
b    Data refer to 1 October.
c    2007.
d    Major metropolitan areas.
e    2015.
f    2016.
g    Data classified according to ISIC Rev. 4.
h    Estimate.
i    Series linked to former series.
j    2014.
k    Data refers to a 5-year period preceding the reference year.
l    Refers to foreign citizens.
m    Data as at the end of December.
n    2004.
o    2012.
p    Including Personal Handy-phone System (PHS) subscriptions.
q    Including Personal Handy-phone System (PHS) and data-only subscriptions.
r    Population aged 6 years and over.
s    Excluding nationals residing abroad.
t    Development Assistance Committee member (OECD)
u    Provisional data.