| Value | Category | Cases | |
|---|---|---|---|
| 0 | 1 |
6.3%
|
|
| 1 | 5 |
31.3%
|
|
| 2 | 5 |
31.3%
|
|
| 3 | 2 |
12.5%
|
|
| 9 | 1 |
6.3%
|
|
| 77 | Don't know | 1 |
6.3%
|
| 99 | Don't know | 1 |
6.3%
|
| Sysmiss | 2741 |