a    Projected estimate (medium fertility variant).
b    2015
c    2017
d    2016
e    Data classified according to ISIC Rev. 4.
f    Estimate.
g    Calculated by the Statistics Division of the United Nations from national indices.
h    Data classified according to ISIC Rev. 3.
i    2014
j    Break in the time series.
k    Areas not elsewhere specified.
l    Data refers to a 5-year period preceding the reference year.
m    Refers to foreign citizens.
n    Including refugees.
o    Data as at the end of December.
p    2001
q    2008
r    2009
s    2007
t    Partial data.
u    R&D budget instead of R&D expenditure or based on R&D budget.
v    Overestimated or based on overestimated data.
w    2013
x    2004
y    The data for crude oil production include 50 per cent of the output of the Neutral Zone.