Footnotes  
a    2017
b    2018
c    Estimate.
d    Calculated by the UN Statistics Division from national indices.
e    2016
f    Data refers to a 5-year period preceding the reference year.
g    2015
h    Refers to foreign citizens.
i    Data as at the end of December.
j    2009
k    2014
l    2008
m    2006
n    2013
o    2004