a    Projected estimate (medium fertility variant).
b    2015
c    Population statistics are compiled from registers.
d    2017
e    2016
f    Data classified according to ISIC Rev. 4.
g    Data classified according to ISIC Rev. 3.
h    Break in the time series.
i    Population aged 14 years and over.
j    2014
k    2003
l    Index base: December 2010=100.
m    Data refers to a 5-year period preceding the reference year.
n    2004
o    2000
p    2013
q    Provisional data.
r    Population aged 0 to 20 years.
s    Population aged 61 years and over.
t    Refers to foreign citizens.
u    2011
v    Estimate.
w    2012
x    2009
y    Including Italian tourists.