| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| -8 | Refusal (spontaneous) | 0 |
0%
|
| 1 | One year or less | 1 |
14.3%
|
| 2 | 1 |
14.3%
|
|
| 3 | 2 |
28.6%
|
|
| 7 | 1 |
14.3%
|
|
| 15 | 1 |
14.3%
|
|
| 27 | 1 |
14.3%
|
|
| Sysmiss | 1232 |