a    Projected estimate (medium fertility variant).
b    2019
c    2018
d    2020
e    Estimate.
f    Bujumbura
g    Data refers to a 5-year period preceding the reference year.
h    Including refugees.
i    Data as at the end of December.
j    Data revision.
k    2017
l    2016
m    Data are as at 1 January of reporting year.
n    Partial data.
o    2012
p    Break in the time series.
q    Including nationals residing abroad.