a    2017
b    Refers to the localities of the Northern Harbour and Southern Harbour.
c    2018
d    Data classified according to ISIC Rev. 4.
e    Estimate.
f    2016
g    2014
h    Data refers to a 5-year period preceding the reference year.
i    2015
j    Data as at the end of December.
k    2004
l    Population aged 16 to 74 years.
m    Users in the last 3 months.
n    Provisional data.
o    Departures by air and by sea.
p    2002