The four pie charts illustrate data on the ages of the populations from two different countries during two time periods: 2005 and 2055.
Overall, it is evident that Oman has a general growth across the age groups, while Spain has a general dip. It is also noteworthy that age groups 60+ from Oman and 15-59 from Spain will experience a significant increase by the end of the period.
In greater detail, two groups aged 60+ and 0-14 from Oman witnessed a similar percentage in 2005, at 48%. However, in 2055, the number of people aged 60+ are projected to increase, while the youngest people will decrease, at 57% and 37%, respectively. In addition, the age bracket 15-59 will witness a surge drop in 2055, at only 2%.
On the other hand, the Spanish group aged over 60 will drop significantly, from 62% to 46%. Similarly, the group age 0-14 will decrease steadily, from 14% to 12%. In addition, the age bracket 15-59 will surge, to 42% at the end of the period.