a    Projected estimate (medium fertility variant).
b    Including Christmas Island, Cocos (Keeling) Islands and Norfolk Island.
c    Including Norfolk Island.
d    2019
e    Refers to Significant Urban Areas as of 2001.
f    2020
g    Excludes irrigation canals and landscaping care.
h    Excludes publishing activities.
i    Includes irrigation canals.
j    Excludes repair of personal and household goods.
k    Estimate.
l    Calculated by the UN Statistics Division from national indices.
m    Break in the time series.
n    Weighted average of index values computed for the 8 capital cities.
o    Imports FOB.
p    Data refers to a 5-year period preceding the reference year.
q    Data as at the end of December.
r    Since Australian HA T-2 covers fiscal year T-2/T-1, the estimation for year T-2 are done to be published in December year T .
s    2018
t    2017
u    Data are as at 1 January of reporting year.
v    Accessed the internet for personal use in a typical week.
w    Population aged 15 years and over.
x    Excluding overseas territories.
y    Excluding nationals residing abroad and crew members.
z    Development Assistance Committee member (OECD).