| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 1457 |
96.7%
|
| 1 | Once | 38 |
2.5%
|
| 2 | Few | 10 |
0.7%
|
| 3 | Many | 1 |
0.1%
|
| Sysmiss | 4482 |