Footnotes  
a    2017
b    2018
c    Estimate.
d    Bujumbura
e    2016
f    Data refers to a 5-year period preceding the reference year.
g    2015
h    Including refugees.
i    Data as at the end of December.
j    Data revision.
k    2004
l    Partial data.
m    2011
n    2014
o    Including nationals residing abroad.
p    Break in the time series.