| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 1751 |
97.5%
|
| 1 | Once | 31 |
1.7%
|
| 2 | Few | 4 |
0.2%
|
| 3 | Many | 9 |
0.5%
|
| Sysmiss | 4193 |