The study of the demographic phenomena Marriages requires a series of annual demographic indicators (synthetic indices) and a series of indices by generation and sex. This section sees the dissemination of population characteristics regarding marriage, its dissolution, cohabitation, or the average age of first-time marriages, inter alia, by sex. The production corresponds to the statistical operation Demographic indicators (ID), and its basic source of information is the operation known as Demographic Survey (ED), of a structural nature.