| Value | Category | Cases | |
|---|---|---|---|
| 1 | No interruption | 229 |
11.6%
|
| 2 | Only once | 228 |
11.5%
|
| 3 | Twice | 409 |
20.7%
|
| 4 | Three Times | 260 |
13.1%
|
| 5 | More than 3 times | 854 |
43.1%
|
| Sysmiss | 2974 |