a    Projected estimate (medium fertility variant).
b    Data refer to 1 October.
c    2007
d    Major metropolitan areas.
e    2017
f    2016
g    Data classified according to ISIC Rev. 4.
h    At producers' prices.
i    Estimate.
j    Calculated by the Statistics Division of the United Nations from national indices.
k    Data refers to a 5-year period preceding the reference year.
l    2015
m    Refers to foreign citizens.
n    Data as at the end of December.
o    2004
p    2014
q    Population aged 6 years and over.
r    Excluding nationals residing abroad.
s    Development Assistance Committee member (OECD).
t    Provisional data.