Footnotes  
a    2017
b    2019
c    2018
d    Estimate.
e    2013
f    2016
g    Data refers to a 5-year period preceding the reference year.
h    Refers to foreign citizens.
i    Data as at the end of December.
j    2011
k    2009
l    2006
m    Data are as at 1 January of reporting year.
n    2008