| Value | Category | Cases | |
|---|---|---|---|
| -8 | Don't know | 5 |
15.2%
|
| 1 | 1 |
3%
|
|
| 12 | 9 |
27.3%
|
|
| 15 | 1 |
3%
|
|
| 50 | 1 |
3%
|
|
| 180 | 2 |
6.1%
|
|
| 220 | 9 |
27.3%
|
|
| 300 | 2 |
6.1%
|
|
| 320 | 1 |
3%
|
|
| 330 | 1 |
3%
|
|
| 500 | 1 |
3%
|
|
| Sysmiss | 3579 |