RP2021 N°02 - The evolution of the population through censuses

Since the 2011 census, the population has increased by 25.7% (131,588 people) to reach 643,941 inhabitants on 8 November 2021. In addition to this significant demographic growth, an ageing of the population is observed: the average age of the population is 39.7 years, i.e. 1 year older than in 2011. This ageing can also be seen in the age pyramids. To represent the relative importance of the different age groups, the young-age dependency ratio and the old-age dependency ratio can be calculated. The young-age dependency ratio indicates the number of children and young people between 0 and 14 years of age per 100 people aged 15 to 64. This ratio has decreased from 25.2% in 2011 to 23.0% in 2021. The old-age dependency ratio, which indicates the number of people aged 65 and over per 100 people aged between 15 and 64, has increased from 20.4% in 2011 to 21.2% in 2021.