| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 30 minutes | 1003 |
4.7%
|
| 2 | Less than 1 hour (but more than 30 minutes) | 543 |
2.6%
|
| 3 | Less than 2 hours (but more than 1 hour) | 65 |
0.3%
|
| 4 | More than 2 hours | 10 |
0%
|
| 8 | Not applicable | 19351 |
91.3%
|
| 9 | Unspecified | 218 |
1%
|