The graph illustrates the age cohorts allocation of people in Iceland between 1990 and 2020.
Overall, while people 55- to 64-year old and from 65- year old people saw the least change in population, the contribution of 25-54 aged group experienced a pronounced increase, which contrasted sharply that of people in the age range of 0-14 and 15-24. It is also important to note that over the examined period, the 25-54s contributed the most to the population of Iceland.
Individuals falling into the 25 to 54 age group started with the highest figure in 1990, at just north of 30%. Thereafter, this age group witnessed a steadily growth in population to just under 50% in 2020, contributing the most to Iceland population.
The trend observed in children (0-14) and younger citizens (15-24) followed a contrasting pattern compared to the trend seen in the 25-54s. Initially, the number of people between 15-24 and 0-14 years old accounted for over 20% and 25% respectively, which were followed by a gradual decline with respective figures being roughly 10% and 20% in the end of the shown period.
Moving to the remaining age groups, the proportion for people aged 65 and more is roughly equal to that of people aged 55-64, at around 12%. After 10 years, the former group showed a marginal rise, surpassed the latter from 2000 onwards to rank third in the population, and reached around 20% by 2020, almost doubled that of 55-64 age group in the same year.