| Value | Category | Cases | |
|---|---|---|---|
| 0 | 849 |
54%
|
|
| 1 | 54 |
3.4%
|
|
| 2 | 173 |
11%
|
|
| 3 | 116 |
7.4%
|
|
| 4 | 127 |
8.1%
|
|
| 5 | 61 |
3.9%
|
|
| 6 | 73 |
4.6%
|
|
| 7 | 7-9 hours | 37 |
2.4%
|
| 8 | 10-12 hours | 41 |
2.6%
|
| 9 | 13 hours or more | 42 |
2.7%
|
| Sysmiss | 773 |