a    2017
b    Refers to Grand Tunis.
c    2019
d    2018
e    At factor cost.
f    Estimate.
g    Break in the time series.
h    2016
i    Data refers to a 5-year period preceding the reference year.
j    Refers to foreign citizens.
k    Data as at the end of December.
l    2011
m    2012
n    Data are as at 1 January of reporting year.