a    Projected estimate (medium fertility variant).
b    2015.
c    Refers to Grand Tunis.
d    2016.
e    At factor cost.
f    Estimate.
g    Series linked to former series.
h    2014.
i    Data refers to a 5-year period preceding the reference year.
j    Refers to foreign citizens.
k    Data as at the end of December.
l    Data revision.
m    2012.
n    2011.
o    2004.
p    Excluding nationals residing abroad.