| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 1728 |
96.5%
|
| 1 | Once | 32 |
1.8%
|
| 2 | Few | 17 |
0.9%
|
| 3 | Many | 13 |
0.7%
|
| Sysmiss | 4198 |