a    2017
b    The national currency of Cuba is the Cuban Peso (CUP). The convertible peso (CUC) is used by foreigners and tourists in Cuba.
c    UN operational exchange rate.
d    2018
e    Estimate.
f    2016
g    Data refers to a 5-year period preceding the reference year.
h    2015
i    Data as at the end of December.
j    Including users of the international network and also those having access only to the Cuban network.
k    2004
l    2014
m    Arrivals by air.
n    2013