| Value | Category | Cases | |
|---|---|---|---|
| 1 | less than 30 minutes | 245 |
69.4%
|
| 2 | 30-60 minutes | 81 |
22.9%
|
| 3 | 1-2 hours | 14 |
4%
|
| 4 | 2-3 hours | 6 |
1.7%
|
| 5 | more than 3 hours | 7 |
2%
|
| Sysmiss | 11762 |