a    Projected estimate (medium fertility variant).
b    2015.
c    Refers to Muscat governorate.
d    2016.
e    Estimate.
f    Break in the time series.
g    Series linked to former series.
h    2014.
i    Data classified according to ISIC Rev. 3.
j    Areas not elsewhere specified.
k    Data refers to a 5-year period preceding the reference year.
l    Refers to foreign citizens.
m    Data as at the end of December.
n    2009.
o    2013.
p    2008.
q    2011.
r    Population aged 5 years and over.
s    2004.