a    Projected estimate (medium fertility variant).
b    2015
c    Refers to the Metropolitan Statistical Area.
d    2016
e    At producers' prices.
f    Estimate.
g    Calculated by the Statistics Division of the United Nations from national indices.
h    2017
i    Data refers to a 5-year period preceding the reference year.
j    2014
k    Population aged 12 years and over.
l    2009
m    2004
n    Arrivals of non-resident tourists by air.
o    2000