| Value | Category | Cases | |
|---|---|---|---|
| 1 | I do not use copen | 1407 |
71.4%
|
| 2 | I never feel a strong desire to use copen | 309 |
15.7%
|
| 3 | 1 hour | 130 |
6.6%
|
| 4 | From 1 to 2 hours | 61 |
3.1%
|
| 5 | From 2 to 4 hours | 19 |
1%
|
| 6 | From 4 to 24 hours | 10 |
0.5%
|
| 7 | 1 to 3 days | 17 |
0.9%
|
| 8 | More than 3 days | 18 |
0.9%
|
| Sysmiss | 24 |