| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 1709 |
95.1%
|
| 1 | Once | 56 |
3.1%
|
| 2 | Few | 19 |
1.1%
|
| 3 | Many | 13 |
0.7%
|
| Sysmiss | 4191 |