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    The Colon is still legal tender as banks in El Salvador accept Colons in small quantities. However, nearly all transactions are settled in US Dollars since 95 per cent of the Colons are no longer in circulation.
e    Refers to the urban parts of the municipalities San Salvador, Mejicanos, Soyapango, Delgado, Ilopango, Cuscatancingo, Ayutuxtepeque and San Marcos.
f    2016.
g    At producers' prices.
h    Estimate.
i    Urban areas.
j    Series linked to former series.
k    2014.
l    Data classified according to ISIC Rev. 3.
m    Data refers to a 5-year period preceding the reference year.
n    Including refugees.
o    Data as at the end of December.
p    Data revision.
q    2008.
r    Data as at the end of June.
s    Population aged 10 years and over.
t    2004.