componerPeriodos        Function to create a vector of texts with the
                        periods to consult
leerCoyuntura           Read data from the Coyuntura module.
leerDB                  Read data from the Datos B<c3><a1>sicos module.
leerPadron              Read data from the Padron module.
leerSIECyL-package      Read Data from the SIE
rellenar                Fill empty elements of a vector.
