| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than a month | 9 |
5.2%
|
| 2 | 1- | 22 |
12.7%
|
| 3 | 2- | 26 |
15%
|
| 4 | 3- | 32 |
18.5%
|
| 5 | 4- | 12 |
6.9%
|
| 6 | 6+ | 53 |
30.6%
|
| 9 | Not specified | 19 |
11%
|
| Sysmiss | 1491 |