| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 1777 |
98.7%
|
| 1 | Once | 17 |
0.9%
|
| 2 | Few | 2 |
0.1%
|
| 3 | Many | 5 |
0.3%
|
| Sysmiss | 4187 |