| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| -7 | Does not apply (spontaneous) | 1 |
4.8%
|
| 1 | One year or less | 7 |
33.3%
|
| 2 | 3 |
14.3%
|
|
| 3 | 3 |
14.3%
|
|
| 4 | 1 |
4.8%
|
|
| 7 | 3 |
14.3%
|
|
| 15 | 1 |
4.8%
|
|
| 21 | 1 |
4.8%
|
|
| 60 | 1 |
4.8%
|
|
| Sysmiss | 311 |