The table below shows the population structure of Birmingham, a major UK city, in the 2011 and 2021 censuses.
| Age group | 2011 Population | 2021 Population |
|---|---|---|
| Under 16 | 242,000 | 248,500 |
| 16 to 24 | 154,000 | 171,200 |
| 25 to 64 | 538,000 | 589,500 |
| 65 and over | 121,000 | 133,500 |
Using the data in the table, identify the age group that experienced the highest percentage growth in population between 2011 and 2021.
Under 16
16 to 24
25 to 64
65 and over
