a    Projected estimate (medium fertility variant).
b    2019
c    African Financial Community (CFA) Franc, Central Bank of West African States (BCEAO).
d    2020
e    Refers to buildings and public works.
f    Refers to trade only.
g    Estimate.
h    Data refers to a 5-year period preceding the reference year.
i    Refers to foreign citizens.
j    Including refugees.
k    Data as at the end of December.
l    2018
m    2007
n    2017
o    Data are as at 1 January of reporting year.
p    Excluding private non-profit.
q    Excluding business enterprise.
r    2014
s    Including nationals residing abroad.