Footnotes  
a    2017
b    2016
c    2018
d    Includes Electricity, gas and water supply.
e    Estimate.
f    2013
g    Data refers to a 5-year period preceding the reference year.
h    2015
i    2002
j    Break in the time series.
k    2012
l    Refers to foreign citizens.
m    Data revision.
n    2003
o    2009
p    2014
q    2006
r    2001
s    2004