| Value | Category | Cases | |
|---|---|---|---|
| 0 | 63 |
73.3%
|
|
| 1 | 15 |
17.4%
|
|
| 2 | 2 |
2.3%
|
|
| 3 | 3 |
3.5%
|
|
| 4 | 2 |
2.3%
|
|
| 8 | 1 |
1.2%
|
|
| Sysmiss | 1992 |