| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 1711 |
97.1%
|
| 1 | Once | 34 |
1.9%
|
| 2 | Few | 12 |
0.7%
|
| 3 | Many | 6 |
0.3%
|
| Sysmiss | 5267 |