a    2017
b    2018
c    Data classified according to ISIC Rev. 4.
d    Estimate.
e    Calculated by the UN Statistics Division from national indices.
f    Index base: 2015=100.
g    Break in the time series.
h    2016
i    Data classified according to ISIC Rev. 3.
j    2014
k    Data refers to a 5-year period preceding the reference year.
l    2015
m    Refers to foreign citizens.
n    Data as at the end of December.
o    2002
p    2004
q    Partial data.