| Value | Category | Cases | |
|---|---|---|---|
| 0 | Zero | 24 |
35.3%
|
| 1 | Once | 21 |
30.9%
|
| 2 | Twice | 5 |
7.4%
|
| 3 | More than twice or blank | 18 |
26.5%
|
| 9 | Missing | 0 |