a    Including Svalbard and Jan Mayen Islands.
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    Data refers to a 5-year period preceding the reference year.
j    2015
k    Data as at the end of December.
l    Population aged 16 to 74 years.
m    Users in the last 3 months.
n    2004
o    Arrivals of non-resident tourists at national borders.
p    Non-resident tourists staying in all types of accommodation establishments.
q    Development Assistance Committee member (OECD).