a    Projected estimate (medium fertility variant).
b    2019
c    Refers to Seoul Special City.
d    2020
e    Excludes irrigation canals and landscaping care.
f    Excludes publishing activities.
g    Includes irrigation canals.
h    Excludes repair of personal and household goods.
i    Estimate.
j    Calculated by the UN Statistics Division from national indices.
k    Data refers to a 5-year period preceding the reference year.
l    Refers to foreign citizens.
m    Including refugees.
n    Data as at the end of December.
o    2018
p    2017
q    Data are as at 1 January of reporting year.
r    Population aged 3 years and over.
s    Population aged 16 to 74 years.
t    Including nationals residing abroad and crew members.