a    Projected estimate (medium fertility variant).
b    2015
c    2017
d    2016
e    Data classified according to ISIC Rev. 4.
f    Estimate.
g    Excluding water and waste management.
h    2014
i    Data refers to a 5-year period preceding the reference year.
j    Refers to foreign citizens.
k    Data as at the end of December.
l    2013
m    Population aged 16 to 74 years.
n    Population aged 16 years and over.
o    Provisional data.
p    2004
q    Development Assistance Committee member (OECD).