a    Projected estimate (medium fertility variant).
b    2015
c    Refers to the localities of Calithèa, Peristérion and Piraeus, among others.
d    2017
e    2016
f    Data classified according to ISIC Rev. 4.
g    Estimate.
h    Calculated by the Statistics Division of the United Nations from national indices.
i    2014
j    Data refers to a 5-year period preceding the reference year.
k    Data as at the end of December.
l    Population aged 16 to 74 years.
m    Provisional data.
n    2004
o    Development Assistance Committee member (OECD).