a    Including Christmas Island, Cocos (Keeling) Islands and Norfolk Island.
b    Projected estimate (medium fertility variant).
c    Including Norfolk Island.
d    2015
e    Refers to Significant Urban Areas as of 2001.
f    2017
g    2016
h    Data classified according to ISIC Rev. 4.
i    Estimate.
j    Weighted average of index values computed for the eight capital cities.
k    Calculated by the Statistics Division of the United Nations from national indices.
l    Break in the time series.
m    Twelve months ending 30 June of the year stated.
n    2014
o    Imports FOB.
p    Areas not elsewhere specified.
q    Data refers to a 5-year period preceding the reference year.
r    Data as at the end of December.
s    2001
t    2009
u    Population aged 15 years and over.
v    2004
w    2013
x    Excluding overseas territories.
y    Excluding nationals residing abroad and crew members.
z    Development Assistance Committee member (OECD).
{    Provisional data.