a    Projected estimate (medium fertility variant).
b    2015.
c    2016.
d    Data classified according to ISIC Rev. 4.
e    Estimate.
f    2014.
g    Data refers to a 5-year period preceding the reference year.
h    Data as at the end of December.
i    Population aged 16 to 74 years.
j    2004.
k    Including leisure and business trips abroad with at least one overnight stay.
l    Development Assistance Committee member (OECD)
m    Provisional data.