a    Projected estimate (medium fertility variant).
b    2015.
c    2016.
d    Estimate.
e    Bujumbura
f    Series linked to former series.
g    2014.
h    Break in the time series.
i    Data refers to a 5-year period preceding the reference year.
j    Including refugees.
k    Data as at the end of December.
l    Estimates should be viewed with caution as these are derived from scarce data.
m    Data revision.
n    2004.
o    2013.
p    Partial data.
q    2011.
r    Including nationals residing abroad.