Study the table below, which shows the actual and predicted population structure for the Shetland Islands.
| Age Group | 2020 Population (%) | 2045 Population (predicted) (%) |
|---|---|---|
| Under 16 | 18% | 14% |
| 16–64 | 61% | 51% |
| 65 and over | 21% | 35% |
Give two differences in the age distribution in the Shetland Islands between 2020 and 2045 (predicted).