| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 1350 |
98.5%
|
| 1 | Once | 15 |
1.1%
|
| 2 | Few | 4 |
0.3%
|
| 3 | Many | 2 |
0.1%
|
| Sysmiss | 5650 |