a    2017
b    2018
c    Estimate.
d    Break in the time series.
e    2016
f    Data refers to a 5-year period preceding the reference year.
g    2015
h    Including refugees.
i    Refers to foreign citizens.
j    Data as at the end of December.
k    2000
l    2008
m    2007
n    Population aged 10 years and over.
o    Excluding business enterprise.
p    Partial data.
q    2004
r    2014