a    Projected estimate (medium fertility variant).
b    2015
c    Refers to Muscat governorate.
d    2017
e    2016
f    Estimate.
g    Data classified according to ISIC Rev. 3.
h    2014
i    Areas not elsewhere specified.
j    Data refers to a 5-year period preceding the reference year.
k    Refers to foreign citizens.
l    Data as at the end of December.
m    2009
n    Population aged 5 years and over.
o    2004