§ Percentage of children in public elementary schools found on routine medical inspection to require treatment (excluding cases of unclean-liness or dental disease):
| Age Group. | 1925. | 1930. | 1932. |
| Age 5 or at entry to school. | 22.3 | 19.8 | 18.0 |
| Age 8 + | 26.1 | 22.5 | 20.3 |
| Age 12 + | 24.0 | 20.7 | 18.3 |