| Value | Low bin | Upper bin | Frequency |
| 0 - 4 | 0 | 4 | 1 |
| 4 - 10 | 4 | 10 | 2 |
| 10 - 15 | 10 | 15 | 3 |
| 15 - 30 | 15 | 30 | 1 |
| 30-More | 30 | More | 0 |