| Value | Category | Cases | |
|---|---|---|---|
| 1 | it lasted less than 10 minutes | 204 |
23.2%
|
| 2 | it lasted between 10 and 30 minutes | 507 |
57.5%
|
| 3 | it lasted more than 30 minutes | 170 |
19.3%
|
| Sysmiss | 3449 |