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    Brazzaville
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    2018
l    2011
m    2012
n    Data are as at 1 January of reporting year.
o    2017