Baby Boom: A period of time with a remarkably high number of births. In Spain, it refers to the years between the mid-fifties and the second half of the seventies.
Census of Population: The counting and registering of demographic data that takes place and is published with a fixed periodicity to meet demographic and social needs.
Natural Increase: Refers to the difference between the number of births and deaths that occur in a region or country.
Real Growth: The relationship between the effects of natural increase and net migration of a population in a given period.
Population Density: An expression that relates the population of a territory to its surface area, indicating the average occupancy level of the territory.
Aging Population: Occurs when the proportion of people over 65 years in a country exceeds 12% of the total population.
Life Expectancy: The average number of years a person is expected to live in a country, usually determined for a given year.
Demographic Sources: All documents that provide knowledge for the study and analysis of the population.
Morbidity: The prevalence of disease in a population.
Infant Mortality: The number of deaths of children aged less than one year in a certain year.
Net Migration: The difference between the number of emigrants and immigrants in a particular place at a given time.
Sangria: A remarkable and continued demographic decline in the population of a place.
Mortality Rate: The number of deaths incurred in a year in a certain territory, in relation to the total population per thousand inhabitants.
Birth Rate: The number of births incurred in a year and territory in relation to the total population per thousand inhabitants.
Demographic Transition: A model that explains the evolution of the population and its growth as a result of a process of modernization in mortality and birth patterns.
Padron Municipal: A relationship of inhabitants of a town containing data similar to the census.
De Jure Population: The sum of present and absent residents in a municipality who are registered in the census at that moment.
De Facto Population: The sum of present residents and passersby of a municipality at the time of the census, including foreign workers and families.
Generational Replacement: An index that allows one to know whether a population can replace itself in a determined period of time through vegetative growth.
