a    Projected estimate (medium fertility variant).
b    2019
c    2020
d    Estimate.
e    Calculated by the UN Statistics Division from national indices.
f    Data refers to a 5-year period preceding the reference year.
g    Including refugees.
h    Data as at the end of December.
i    Data revision.
j    2018
k    2011
l    2014
m    2017
n    Data are as at 1 January of reporting year.
o    Arrivals by air.