a    Projected estimate (medium fertility variant).
b    2019
c    2020
d    Estimate.
e    Break in the time series.
f    Data refer to 7 cities only.
g    Base: 2016 = 100
h    Data refers to a 5-year period preceding the reference year.
i    Refers to foreign citizens.
j    Including refugees.
k    Data as at the end of December.
l    Data revision.
m    2018
n    2014
o    2009
p    Data are as at 1 January of reporting year.
q    2016
r    Partial data.
s    Government only.
t    2017
u    Arrivals of non-resident tourists by air.