| Value | Category | Cases | |
|---|---|---|---|
| 1 | below 15 minutes | 2121 |
58.5%
|
| 2 | 16-30 minutes | 788 |
21.7%
|
| 3 | 31-45 minutes | 280 |
7.7%
|
| 4 | 46-60 minutes | 223 |
6.2%
|
| 5 | 61-90 minutes | 67 |
1.8%
|
| 6 | 91-120 minutes | 53 |
1.5%
|
| 7 | above 120 minutes | 92 |
2.5%
|
| Sysmiss | 1330 |