a    2017
b    Population statistics are compiled from registers.
c    2015
d    2018
e    Data classified according to ISIC Rev. 4.
f    Data classified according to ISIC Rev. 3.
g    Break in the time series.
h    Population aged 14 years and over.
i    2014
j    2003
k    Index base: December 2010=100.
l    Data refers to a 5-year period preceding the reference year.
m    2004
n    2000
o    2013
p    Population aged 0 to 20 years.
q    Provisional data.
r    Population aged 61 years and over.
s    Refers to foreign citizens.
t    2016
u    2011
v    Estimate.
w    2012
x    Including Italian tourists.