a    Projected estimate (medium fertility variant).
b    The total surface is 21 040.79 square kilometres, without taking into account the last ruling of The Hague.
c    2015
d    Refers to the urban parts of the municipalities San Salvador, Mejicanos, Soyapango, Delgado, Ilopango, Cuscatancingo, Ayutuxtepeque and San Marcos.
e    2017
f    2016
g    At producers' prices.
h    Estimate.
i    Urban areas.
j    Data classified according to ISIC Rev. 3.
k    2014
l    Data refers to a 5-year period preceding the reference year.
m    Including refugees.
n    Data as at the end of December.
o    2008
p    Population aged 10 years and over.
q    2004