| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 15 minutes | 1614 |
11.5%
|
| 2 | Between 15 and 30 minutes | 2150 |
15.4%
|
| 3 | Between 31 and 60 minutes | 2403 |
17.2%
|
| 4 | More than 60 minutes | 3821 |
27.3%
|
| 99 | Don?t know | 4006 |
28.6%
|