a    Projected estimate (medium fertility variant).
b    2015.
c    2016.
d    Data classified according to ISIC Rev. 4.
e    Estimate.
f    Break in the time series.
g    2014.
h    Data refers to a 5-year period preceding the reference year.
i    Data as at the end of December.
j    Includes data-only subscriptions.
k    Population aged 16 to 74 years.
l    2004.
m    Development Assistance Committee member (OECD)
n    Provisional data.