Footnotes  
a    2017
b    2018
c    Estimate.
d    2013
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    2011
k    2004
l    2009
m    2006
n    2003
o    2014
p    2008