| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 15 minutes | 1041 |
7.4%
|
| 2 | Between 15 and 30 minutes | 1941 |
13.9%
|
| 3 | Between 31 and 60 minutes | 2413 |
17.2%
|
| 4 | More than 60 minutes | 4501 |
32.2%
|
| 99 | Don?t know | 4098 |
29.3%
|