a    Excluding inland water.
b    2017
c    2018
d    Data classified according to ISIC Rev. 4.
e    Estimate.
f    2016
g    Excluding water and waste management.
h    2014
i    Europe not elsewhere specified.
j    Data refers to a 5-year period preceding the reference year.
k    2015
l    Data as at the end of December.
m    2009
n    Population aged 16 to 74 years.
o    Users in the last 3 months.
p    2004
q    Non-resident tourists staying in commercial accommodation only (representing approximately 25% of all tourists).
r    Development Assistance Committee member (OECD).