a    Projected estimate (medium fertility variant).
b    2015
c    2017
d    2016
e    Data classified according to ISIC Rev. 4.
f    Estimate.
g    Excluding water and waste management.
h    2014
i    Data refers to a 5-year period preceding the reference year.
j    Data as at the end of December.
k    Non-citizens of Latvia is the only category of residents who are not Latvian citizens, but who enjoy the right to reside in Latvia ex lege (all others require a resident permit) and an immediate right to acquire citizenship through registration and/or naturalisation (depending on age).
l    2004
m    Population aged 16 to 74 years.
n    Provisional data.
o    Non-resident departures. Survey of persons crossing the state border.