| Value | Category | Cases | |
|---|---|---|---|
| 0 | 559 |
87.8%
|
|
| 10 | 2 |
0.3%
|
|
| 12 | 1 |
0.2%
|
|
| 20 | 2 |
0.3%
|
|
| 24 | 1 |
0.2%
|
|
| 50 | 1 |
0.2%
|
|
| 77 | Don't know | 71 |
11.1%
|
| Sysmiss | 1927 |