a    Projected estimate (medium fertility variant).
b    2015.
c    The national currency of Cuba is the Cuban Peso (CUP). The convertible peso (CUC) is used by foreigners and tourists in Cuba.
d    UN operational exchange rate.
e    2016.
f    Estimate.
g    2008.
h    2014.
i    Data refers to a 5-year period preceding the reference year.
j    Data as at the end of December.
k    2011.
l    Including users of the international network and also those having access only to the Cuban network.
m    2004.
n    Arrivals by air.