| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 1494 |
97.8%
|
| 1 | Once | 23 |
1.5%
|
| 2 | Few | 8 |
0.5%
|
| 3 | Many | 2 |
0.1%
|
| Sysmiss | 5503 |