a    2017
b    De jure population.
c    Population statistics are compiled from registers.
d    2016
e    2018
f    Data classified according to ISIC Rev. 4.
g    Calculated by the UN Statistics Division from national indices.
h    Estimate.
i    Data refers to a 5-year period preceding the reference year.
j    2015
k    2012
l    Refers to foreign citizens.
m    2003
n    2004
o    2008
p    2011
q    2014
r    Break in the time series.