| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
2%
|
| -8 | Refusal (spontaneous) | 0 |
0%
|
| 1 | One year or less | 22 |
44.9%
|
| 2 | 10 |
20.4%
|
|
| 3 | 4 |
8.2%
|
|
| 5 | 2 |
4.1%
|
|
| 6 | 1 |
2%
|
|
| 7 | 3 |
6.1%
|
|
| 8 | 1 |
2%
|
|
| 9 | 1 |
2%
|
|
| 13 | 1 |
2%
|
|
| 18 | 1 |
2%
|
|
| 26 | 1 |
2%
|
|
| 36 | 1 |
2%
|
|
| Sysmiss | 48 |