| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 30 minutes | 12821 |
60%
|
| 2 | Less than 1 hour (but more than 30 minutes) | 6022 |
28.2%
|
| 3 | Less than 2 hours (but more than 1 hour) | 1315 |
6.2%
|
| 4 | More than 2 hours | 237 |
1.1%
|
| 8 | Not applicable | 604 |
2.8%
|
| 9 | Unspecified | 375 |
1.8%
|