| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. less than 15 minutes | 1842 |
42.1%
|
| 2 | 2. 15 – 30 minutes | 1472 |
33.6%
|
| 3 | 3. 31 – 60 minutes | 751 |
17.2%
|
| 4 | 4. more than an hour | 313 |
7.1%
|
| Sysmiss | 160 |