| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 1460 |
96.8%
|
| 1 | Once | 32 |
2.1%
|
| 2 | Few | 13 |
0.9%
|
| 3 | Many | 3 |
0.2%
|
| Sysmiss | 4480 |