a    Projected estimate (medium fertility variant).
b    2019
c    Refers to the population of Brussels-Capital Region and "communes" of the agglomeration and suburbs.
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    Data as at the end of December.
m    2018
n    2017
o    Data are as at 1 January of reporting year.
p    Users in the last 3 months.
q    Provisional data.
r    Break in the time series.
s    Development Assistance Committee member (OECD).