| Value | Category | Cases | |
|---|---|---|---|
| 1 | Up to 30 minutes | 1 |
0.9%
|
| 2 | > 30 minutes to 60 minutes | 8 |
7%
|
| 3 | > 60 minutes to 90 minutes | 44 |
38.3%
|
| 4 | Over 90 minutes | 62 |
53.9%
|
| Sysmiss | 4 |