| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. No interruption | 399 |
14.1%
|
| 2 | 2. Only once | 462 |
16.4%
|
| 3 | 3. Twice | 584 |
20.7%
|
| 4 | 4. Three Times | 493 |
17.5%
|
| 5 | 5. More than 3 times | 882 |
31.3%
|
| Sysmiss | 2139 |