a    Projected estimate (medium fertility variant).
b    2015
c    2017
d    2016
e    Data classified according to ISIC Rev. 4.
f    Estimate.
g    Data refers to a 5-year period preceding the reference year.
h    Data as at the end of December.
i    2004
j    2014
k    2009
l    2011
m    Break in the time series.
n    Population aged 12 years and over.
o    Including nationals residing abroad.