| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than an hour | 1705 |
12.2%
|
| 2 | 1 hour ? 3 hours | 4293 |
30.7%
|
| 3 | 4 hours ? 5 hours | 3769 |
26.9%
|
| 4 | 6 hours ? 8 hours | 2279 |
16.3%
|
| 5 | 9 hour ? 10 hours | 932 |
6.7%
|
| 6 | 11 hours ? 15 hours | 641 |
4.6%
|
| 7 | 16 hours ? 20 hours | 132 |
0.9%
|
| 8 | 21 hours ? 24 hours | 243 |
1.7%
|