a    Projected estimate (medium fertility variant).
b    Including Christmas Island, Cocos (Keeling) Islands and Norfolk Island.
c    Including Norfolk Island.
d    2015.
e    2016.
f    Data classified according to ISIC Rev. 4.
g    Estimate.
h    2014.
i    Twelve months ending 30 June of the year stated.
j    Imports FOB.
k    Data refers to a 5-year period preceding the reference year.
l    Data as at the end of December.
m    2001.
n    2009.
o    2013.
p    Data as at the end of June.
q    Population aged 15 years and over.
r    2004.
s    Excluding overseas territories.
t    Excluding nationals residing abroad and crew members.
u    Development Assistance Committee member (OECD)
v    Provisional data.