| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1-2 hours | 68 |
3.8%
|
| 2 | 3-4 hours | 11 |
0.6%
|
| 3 | 5-6 hours | 5 |
0.3%
|
| 4 | 6 hour or more | 1 |
0.1%
|
| 5 | Less than an hour | 74 |
4.2%
|
| Missing value | 1619 |
91.1%
|