| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not at all | 34 |
4.4%
|
| 2 | Up to 10 | 170 |
21.8%
|
| 3 | Up to 20 | 284 |
36.4%
|
| 4 | Up to 100 or higher | 292 |
37.4%
|
| Sysmiss | 220 |