a    2017
b    2018
c    Data classified according to ISIC Rev. 4.
d    Estimate.
e    Break in the time series.
f    Calculated by the UN Statistics Division from national indices.
g    2016
h    Excluding water and waste management.
i    2014
j    Data refers to a 5-year period preceding the reference year.
k    2015
l    Data as at the end of December.
m    2002
n    Data refer to offences, not victims, of intentional homicide.
o    Population aged 16 to 74 years.
p    Users in the last 3 months.
q    2004