a    Projected estimate (medium fertility variant).
b    2019
c    African Financial Community (CFA) Franc, Bank of Central African States (BEAC).
d    2020
e    Estimate.
f    N'Djamena
g    Calculated by the UN Statistics Division from national indices.
h    Data refers to a 5-year period preceding the reference year.
i    Including refugees.
j    Data as at the end of December.
k    2018
l    2006
m    2013
n    2017
o    Data are as at 1 January of reporting year.
p    Excluding business enterprise.
q    Excluding private non-profit.
r    2016
s    Arrivals by air.