| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 1677 |
93.2%
|
| 1 | Once | 84 |
4.7%
|
| 2 | Few | 30 |
1.7%
|
| 3 | Many | 8 |
0.4%
|
| Sysmiss | 4189 |