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