a    2017
b    African Financial Community (CFA) Franc, Bank of Central African States (BEAC).
c    2018
d    Estimate.
e    Provisional data.
f    N'Djamena
g    2015
h    2016
i    Data classified according to ISIC Rev. 3.
j    Country data supplemented with data from the Observatoire Economique et Statistique d’Afrique Subsaharienne (Afristat).
k    2013
l    Data refers to a 5-year period preceding the reference year.
m    Including refugees.
n    Data as at the end of December.
o    2004
p    2006
q    2014
r    Excluding private non-profit.
s    Excluding business enterprise.
t    Arrivals by air.