a    2017
b    2018
c    Data classified according to ISIC Rev. 4.
d    Estimate.
e    2016
f    Asia not elsewhere specified.
g    Data refers to a 5-year period preceding the reference year.
h    2015
i    Including refugees.
j    Refers to foreign citizens.
k    2003
l    2008
m    2006
n    Partial data.
o    2004
p    2009
q    Excluding private non-profit.
r    Excluding business enterprise.
s    2014
t    Break in the time series.