| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 1773 |
98.4%
|
| 1 | Once | 23 |
1.3%
|
| 2 | Few | 2 |
0.1%
|
| 3 | Many | 3 |
0.2%
|
| Sysmiss | 4187 |