| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
5.9%
|
| -7 | Does not apply | 0 |
0%
|
| 1 | One year or less | 1 |
5.9%
|
| 2 | 2 |
11.8%
|
|
| 3 | 1 |
5.9%
|
|
| 4 | 1 |
5.9%
|
|
| 5 | 1 |
5.9%
|
|
| 7 | 3 |
17.6%
|
|
| 14 | 2 |
11.8%
|
|
| 21 | 1 |
5.9%
|
|
| 30 | 2 |
11.8%
|
|
| 60 | 2 |
11.8%
|
|
| Sysmiss | 216 |