a    Projected estimate (medium fertility variant).
b    2019
c    2020
d    Estimate.
e    Data up to 2011 refer to former Sudan (including South Sudan) and data beginning 2012 is attributed to Sudan without South Sudan.
f    Data refers to a 5-year period preceding the reference year.
g    Including refugees.
h    Data as at the end of December.
i    Including South Sudan.
j    2018
k    2008
l    2017
m    2009
n    2005
o    Including nationals residing abroad.