a    2017
b    2018
c    Data classified according to ISIC Rev. 4.
d    Estimate.
e    Provisional data.
f    Break in the time series.
g    2016
h    Data classified according to ISIC Rev. 3.
i    Data refers to a 5-year period preceding the reference year.
j    2015
k    Including refugees.
l    Data as at the end of December.
m    2014
n    2000
o    Partial data.
p    Excluding private non-profit.
q    Excluding business enterprise.
r    2004