a    2017
b    Break in the time series.
c    2016
d    2018
e    Population aged 16 years and over.
f    Data classified according to ISIC Rev. 3.
g    2000
h    Data refers to a 5-year period preceding the reference year.
i    2015
j    2013
k    2006
l    2011
m    De jure population.
n    Including armed forces stationed in the area.
o    Data refers to a 2-year period up to and including the reference year.
p    2012
q    Partial data.
r    2004
s    Estimate.