a    Projected estimate (medium fertility variant).
b    2015.
c    2016.
d    Data classified according to ISIC Rev. 4.
e    Estimate.
f    Excluding tobacco.
g    2014.
h    Excluding water and waste management.
i    Data refers to a 5-year period preceding the reference year.
j    Data as at the end of December.
k    Population aged 16 to 74 years.
l    Provisional data.
m    2004.
n    Including San Marino.
o    Data include San Marino and the Holy See.
p    Excluding seasonal and border workers.
q    Development Assistance Committee member (OECD)