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    2019
d    UN operational exchange rate.
e    2018
f    Estimate.
g    2016
h    Data refers to a 5-year period preceding the reference year.
i    Data as at the end of December.
j    Data are as at 1 January of reporting year.
k    Including users of the international network and also those having access only to the Cuban network.
l    Population aged 6 years and over.
m    Arrivals by air.