a    Projected estimate (medium fertility variant).
b    2019
c    2020
d    Estimate.
e    Areas not elsewhere specified.
f    Data refers to a 5-year period preceding the reference year.
g    Including refugees.
h    Refers to foreign citizens.
i    Data as at the end of December.
j    2018
k    2014
l    2007
m    2013
n    Data are as at 1 January of reporting year.
o    Last week.
p    Population aged 15 years and over.
q    Based on R&D budget instead of R&D expenditure.
r    Excluding business enterprise.
s    Excluding private non-profit.