a    Projected estimate (medium fertility variant).
b    2015.
c    South Sudanese Pound.
d    2016.
e    Population aged 10 years and over.
f    2008.
g    Break in the time series.
h    2014.
i    Data refers to a 5-year period preceding the reference year.
j    Including refugees.
k    Estimates should be viewed with caution as these are derived from scarce data.
l    2012.
m    Data obtained from five mobile operators.
n    Estimate.