| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 1450 |
98.1%
|
| 1 | Once | 23 |
1.6%
|
| 2 | Few | 4 |
0.3%
|
| 3 | Many | 1 |
0.1%
|
| Sysmiss | 4510 |