The Centenarian Population Estimates provide a calculation of the population aged 100 years old or over residing in Catalonia, classified by sex and age up to the 105-year-old and over group.
Idescat draws up estimates of the centenarian population upon their deaths. The information of the age at the time of death is used to calculate the elderly population in the last year and in previous years. The centenarian population of each age is calculated upon the basis of the proportion of the number of people of a generation still alive with respect to the number of people of the same generation who have died in recent years.
The availability of new data on deaths each year permits a retrospective calculation of the centenarian populations of previous years and more accurate estimates. For this reason, Centenarian Population Estimates are published each year and those of previous years are updated. The data become definitive years later, when all the centenarian people of a generation have died.